Database Develop

JamPort USB DAC car audio?

http://www.isimplesolutions.com/charge/jamport-streaming-charging.html
Anybody here ever play with one of these?
It says it works with the GS4, it seems to be just a USB DAC. From what I remember, our N4's work on this type of device, right?
From the user manual:
IS3301 uses Android Open Accessory Protocol. Accessory mode is ultimatley
dependant on the devices hardware, and not all devices support accessory mode
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This is pretty much exactly the device I've been looking for. I've got a really good head unit, it's just that it's pre-BT/USB/anything else useful. It'd cost me pretty big bucks to replace with a equivalent "modern" HU. I currently use a 3.5mm->RCA->HU aux input setup right now that is lacking in quality.
I just can't find anything about this thing online.

I'm not sure about that particular device, but most if not all USB DACs work with the N4 (on 4.x at least, LP reportedly broke compatibility with some previously working units ). I have an Asus Xonar U3 ($40 when I bought it from Amazon), and it's really FAR surpassed my expectations. As long as you plug it in before launching your (any, afaik) music player, it should produce a very noticeable improvement on sq. If you do end up getting a USB DAC, I'd highly recommend at least checking out the 14 day trial of USB Audio Player Pro... it bypasses the system's drivers and uses it's own, and IMO the sq is untouchable! If you listen to a lot of music from your N4 (a great output source in itself, x100 with UAPP) I can say pretty confidently that investing in a DAC will greatly increase your enjoyment! :good:

i use my nexus 7 as my in dash, how would this help ? currently just using 3.5mm port to rca to get the audio out...

does it charge the tablet at the same time?

I should have mentioned in my post above that portable USB DACs are primarily intended to be used with headphones. They will generally improve sound output to speakers as well, but a car-audio specific device like the one the OP posted may be better for that application... however, the only immediately apparent difference are the RCA plugs vs. aux. Worth the price difference? Not having heard that device as well as the lack of info/reviews (possibly a bad sign), my guess would be "no". With a device like mine or the Fiio usb models, you get the bonus of versatility: carrying it in your pocket and using headphones and then just using it in your car via an aux input (as long as your receiver has one). A caveat to using a portable USB DAC is that they actually drain your battery significantly faster (I found it odd that mine would only work with a "regular" micro usb to usb adapter cable, no sound when I tried it with a powered micro usb hub).
There may very well be better products if the intent is just to use it for car audio... I'm just not personally aware of any. I'm sure there are better forums (similar to head-fi.org but specific to cars) where you could probably find or get better answers re: good DACs for car audio

masri1987 said:
does it charge the tablet at the same time?
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The one I posted says it does charge @2A.
My other question is: What controls the audio volume when you use a DAC?
My biggest issue is even with the volume maxed on my N4, my h/u sees very low input volume, and I have to nearly max out my h/u's volume to get anywhere, which induces a lot of clipping and distortion.. Which is bad.
jazzmachine said:
I'm not sure about that particular device, but most if not all USB DACs work with the N4 (on 4.x at least, LP reportedly broke compatibility with some previously working units ). I have an Asus Xonar U3 ($40 when I bought it from Amazon), and it's really FAR surpassed my expectations. As long as you plug it in before launching your (any, afaik) music player, it should produce a very noticeable improvement on sq. If you do end up getting a USB DAC, I'd highly recommend at least checking out the 14 day trial of USB Audio Player Pro... it bypasses the system's drivers and uses it's own, and IMO the sq is untouchable! If you listen to a lot of music from your N4 (a great output source in itself, x100 with UAPP) I can say pretty confidently that investing in a DAC will greatly increase your enjoyment! :good:
Click to expand...
Click to collapse
I hear you on the lack of reviews/info on it being a bad sign, but I'm guessing the vast majority of people have no idea wtf a DAC even is..

ummduh said:
The one I posted says it does charge @2A.
My other question is: What controls the audio volume when you use a DAC?
My biggest issue is even with the volume maxed on my N4, my h/u sees very low input volume, and I have to nearly max out my h/u's volume to get anywhere, which induces a lot of clipping and distortion.. Which is bad.
I hear you on the lack of reviews/info on it being a bad sign, but I'm guessing the vast majority of people have no idea wtf a DAC even is..
Click to expand...
Click to collapse
i use a line-driver before i route the audio to my amp to make it sound like a pioneer deck , but that's wit a 3.5 mm to rca plug... imagine with this product.. i'm concerned about overheating because it's constantly charging and i live in phoenix and it's hot as you know what
and viper4android of course

It looks like the charge wiring is separate, you could always switch it on/off as required.
I'm thinking about giving this a go and see what happens. It's still a TON cheaper than replacing my h/u.

ummduh said:
The one I posted says it does charge @2A.
My other question is: What controls the audio volume when you use a DAC?
My biggest issue is even with the volume maxed on my N4, my h/u sees very low input volume, and I have to nearly max out my h/u's volume to get anywhere, which induces a lot of clipping and distortion.. Which is bad.
Click to expand...
Click to collapse
Re: volume control, it depends. Some have some kind of volume control on the DAC, but most don't. With most music players you just control the volume as usual from the phone. Usually the output is louder than it would be otherwise, but particularly clarity at high volume. Considering your description, I think you'd notice even more of a benefit from using UAPP - the volume is controlled by a slider on the "now playing" screen (there's a setting to use the physical volume buttons also, but warns that it will drain much more battery) and it can definitely play music louder overall.

gonna try this as well..
Does a USB OTG kernel capable is required for this?
---------- Post added at 06:34 PM ---------- Previous post was at 06:33 PM ----------
http://www.amazon.com/iSimple-Charg...e=UTF8&qid=1427909651&sr=8-1&keywords=JamPort
is this the same product? damn cheaper too.

According to the specs on that page, yes, it's the same product; "IS3301".
And thanks for finding it! I'll pick it up and give it a try and post back, eventually.

Well, got it and installed it.
A few things:
1) Was wrong on being able to switch power. If you don't hook up the power wires, the DAC doesn't power up.
2)Won't work on the Note4 with a stock /rooted Tmobile ROM. Just can't do it. Why? No idea. The USB Audio Pro app doesn't work either.
3)DOES WORK and sounds great with both a Nexus 7 (2012) 4.4.4 and an ASUS ME173X., 4.2.2.
4)Even working on those 2 tablets, it pops up a dialog box saying something to the effect of "No apps that are compatible with this device are installed". Still works anyways, every app I tried played properly through it.
5)Audio is basically ON/OFF. If you adjust the audio volume on the tablet it's all or nothing, no in between.
I'd still like to figure out how to get it working on the Note, tethering the tab to my phone is less than elegant, the ME173x tablet is pitifully slow and horribly unresponsive, and it seems Samsung in their infinite wisdom have also removed BT tethering.

Also not working with Note 4 and the canadian 5.0.1 ROM (chenxiaolong). Argh. Going to try some different cabling, possibly a data only cable, I've read some Samsung phones do weird stuff with USBOTG and charging.

Samsung Level U Pro - BT Headphones - Wow

Picked these up on Amazon for £70, main reason was level app gives all the function and tuning sound to suit plus the two speaker per earpiece design.
Cut to the chase stunning sound. I am picky with around 10 pairs of headphones ranging from Sony, Beats to AT. Also an ex audiophile coming from full on active Naim Audio system. Reason for mentioning that was the way Naim exerts grip, control, detail and ease rarely phased.
This sums up the headphones, never experienced this sort of deep controlled taut bass on headphones coupled with a clear midrange- normally one ruins the other.
The sound level when you attach the right size buds is shockingly loud - at max phone and headset zero distortion.
Plus you get all the notifications and crap s voice. Can take calls not tried says has two microphones.
Negatives, neck surround it very hard and stiff, ear buds do not totally seal and on my set BT occasionally disconnects but worst of all an ongoing BT skip every 15 - 30 seconds.
Hope I can solve the connectivity as even my cheap mpow have zero BT issues.
All that said an awesome headset.

Update: Reset the level U and unpaired, then repaired - all sorted NO BT connectivity issues, also have my Gear S2 and Car BT connected this morning.
Wore it to work, forgot I had it on as it was just hanging on my shoulders, realised when it vibrated (notifications).
Tried a few call, very good, I prefer to use it with 1 earpiece, mic quality (has 2) seems very good to the other party.

What about battery life?

Not really timed it but on a full charge 6 days ago have had 5hrs use in the app still shows more than half.

#EarphonesNotHeadphones

level u
i am experiencing the stuttering issues you were talking about instead i have samsung level pro how did you reset yours?

I have a problem. i have samsung s6 and level u, and while i'm talking some times i can't hear the other side the same him.
if i turn off bluetooth and the on everything is ok. it doesn;t lose the connection. do you know what problem is this??
with music listening i have no problem
pls help

As mentioned I had a skip issue but that was with my s2 watch and headphones after unpairing and repairing never been an issue.
Sent from my SM-G935F using XDA-Developers mobile app

Hi
I have the samsumg level u pro anc . In my opinion i can say the sound is not the best
is normal like any other device .The anc version sorry to say this but it's garbage and the Uhd I don't see a big difference when is on or off . I had many bluetooth headsets and i can say for my the best bt headset was the motorola s9 a real HD sound after that the s10 and s11 they didn't have a sweet sound
btw. I have stuttering too I don't know if it's the headset or the samsung s7 .
I hope samsung gives a fix for this.

Bought the Level U Pro today
oskedlack said:
I have the samsumg level u pro anc . In my opinion i can say the sound is not the best
is normal like any other device .The anc version sorry to say this but it's garbage and the Uhd I don't see a big difference when is on or off . I had many bluetooth headsets and i can say for my the best bt headset was the motorola s9 a real HD sound after that the s10 and s11 they didn't have a sweet sound
btw. I have stuttering too I don't know if it's the headset or the samsung s7 .
I hope samsung gives a fix for this.
Click to expand...
Click to collapse
Bought this unit today and paired with Axon 7 Mini and instantly hated the sound and volume level.....of course i was driving away from the store and just had to try it. I immediately put the headset on my center console in my car and left it till i finished up my other activities and didn't touch it till i got home and downloaded the Level app from the play store. Pulled up reviews on amazon,and Headfi and saw people raving about the sound quality,put my laptop down and started going through my settings on the phone players(Neutron,Poweramp beta,and built in ZTE hi res player)......then setup Samsung Level app and changed the silicone tips to a set that fit my ears perfectly and then .....DAMN ! These things DO sound amazing. The quality of the drivers is beyond what i expected and the volume is just perfect....I love to crank it up,but my ears have been damaged through playing in live bands and crazy loud car stereos,and the volume was loud but not painfully so....These are keepers and sound great with the Dolby Atmos turned on. My two cents .....great deal when you find these now for $39.99

Low volume listening to music on headphones

Just got my OP3T yesterday, and absolutely love it...EXCEPT that when I listen to music on (wired) headphones the volume does not go very loud. Even when I turn it up to the highest setting, just not that loud. And the headphones are plugged in all the way, they work with other phones, etc., etc. Anyone else having this issue?

You gotta plug it in properly, that was the issue with mine. It almost requires an unreasonable amount of force to plug it in or plug it out.

I use wireless bt headphone, and the sound is pretty loud, compare with the droid turbo, will try the wired headphone later
Sent from my ONEPLUS A3003 using XDA-Developers mobile app

No problem with mine, turning it up more than halfway is way too loud. Best sound I've ever had from a phone.

stevemass said:
Just got my OP3T yesterday, and absolutely love it...EXCEPT that when I listen to music on (wired) headphones the volume does not go very loud. Even when I turn it up to the highest setting, just not that loud. And the headphones are plugged in all the way, they work with other phones, etc., etc. Anyone else having this issue?
Click to expand...
Click to collapse
What's is the impedance of your headphones? The higher the impedance the lower the volume, usually higher end/better quality use high impedance 32 ohm's+. My Sony's are 32 and are reasonable but still use my Fiio A1 for some extra umph! Might get the Fiio k1 and see what USB audio is like and get another pair of AKG's as they are my favourite sound signature.

ExjeetzZ said:
You gotta plug it in properly, that was the issue with mine. It almost requires an unreasonable amount of force to plug it in or plug it out.
Click to expand...
Click to collapse
Yes, I'm aware of this. Mine have been plugged in fully.

LMcR92 said:
What's is the impedance of your headphones? The higher the impedance the lower the volume, usually higher end/better quality use high impedance 32 ohm's+. My Sony's are 32 and are reasonable but still use my Fiio A1 for some extra umph! Might get the Fiio k1 and see what USB audio is like and get another pair of AKG's as they are my favourite sound signature.
Click to expand...
Click to collapse
The impedance is 16, so that shouldn't be the issue.

stevemass said:
The impedance is 16, so that shouldn't be the issue.
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Click to collapse
Strange I get decent sound out the jack alone. What is the make and model of your headphones?

LMcR92 said:
Strange I get decent sound out the jack alone. What is the make and model of your headphones?
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Click to collapse
Have tried it with both Sony MDR-EX58V earbuds and Sony MDR-V8 over-the-ears.

stevemass said:
Have tried it with both Sony MDR-EX58V earbuds and Sony MDR-V8 over-the-ears.
Click to expand...
Click to collapse
Weird why not invest in a Fiio A1 or USB variant K1, I'm thinking of jumping on the USB audio to see how it is. I know that "it's not the point" but a worthwhile purchase if you enjoy music.

Mine is plenty loud. Used my Xiaomi Piston 3's all day with it.

Higher impedance means more control over your volume because you're basically forced to use an external amp/dac, doesn't necessarily mean better quality.

Same issue, loudest volume is about right for me, still, does not go as loud as my Nexus 5 did.

More than loud enough at 65% volume with my Audio Technica and Shure headphones. I ended up lowering the max volume with custom kernel.

You can always try the "Increased Headset Volume"-magisk module if you want louder headset volume.

Bluetooh volume problem

Hi people,
So i got my new Realme x2 Pro yesterday. Overall i'm really happy with the phone. Today when commuting, i used the bluetooth earphones (sony wf1000-xm3) and... Surprise! the maximum volume is a third of what it was the they before yesterday with my htc u11.
I'm pretty sure it's an option of the OS that is screwing me up, but cannot find the fix. Someone has a similar problem to mine and a way to solve it?
i tried:
- disable the dobly atmos options in sound settings.
- on developer options: disable the absolute volume.
non of them worked.
Oh, forgot to say: I'm on the European version of the OS

valthunder said:
Hi people,
So i got my new Realme x2 Pro yesterday. Overall i'm really happy with the phone. Today when commuting, i used the bluetooth earphones (sony wf1000-xm3) and... Surprise! the maximum volume is a third of what it was the they before yesterday with my htc u11.
I'm pretty sure it's an option of the OS that is screwing me up, but cannot find the fix. Someone has a similar problem to mine and a way to solve it?
i tried:
- disable the dobly atmos options in sound settings.
- on developer options: disable the absolute volume.
non of them worked.
Oh, forgot to say: I'm on the European version of the OS
Click to expand...
Click to collapse
I have the same setup and don't have issue with max sound .... have you tried putting the volume up via the headphones directly (touch gesture slide up on the right cup) ?

jakelamotta said:
I have the same setup and don't have issue with max sound .... have you tried putting the volume up via the headphones directly (touch gesture slide up on the right cup) ?
Click to expand...
Click to collapse
Hi Jake, It's The WF model, not WH (have them too). The WF does not have volume control (because there is no space to swipe)
but once i arrive home, i'll try what happens with the WH.

jakelamotta said:
I have the same setup and don't have issue with max sound .... have you tried putting the volume up via the headphones directly (touch gesture slide up on the right cup) ?
Click to expand...
Click to collapse
valthunder said:
Hi Jake, It's The WF model, not WH (have them too). The WF does not have volume control (because there is no space to swipe)
but once i arrive home, i'll try what happens with the WH.
Click to expand...
Click to collapse
So, I'm trying now with the WH-1000xm3 and it's the same problem as the WF.
The maximum volume i'm getting is as best a third of what i had with the HTC U11.
There is something very wrong here.

So, at the end really was a problem with the headset.
no problem with the phone bluetooth.
please close the thread

Hi
I have experienced the same problem with a set of Bose earphones and a bluetooth speaker. The volume is significantly less than when these devices are used with any other mobile phone.
It is categorically an issue with the OS (unless I am missing something flagrant, or worse yet it is a hardware issue). Grateful for anyone's advice.
Alex

alexleigh1992 said:
Hi
I have experienced the same problem with a set of Bose earphones and a bluetooth speaker. The volume is significantly less than when these devices are used with any other mobile phone.
It is categorically an issue with the OS (unless I am missing something flagrant, or worse yet it is a hardware issue). Grateful for anyone's advice.
Alex
Click to expand...
Click to collapse
verify within the app of bose the volume of the headset (if you have the option there)

valthunder said:
verify within the app of bose the volume of the headset (if you have the option there)
Click to expand...
Click to collapse
Thanks I will look into it, but these are fairly simple bluetooth earphones, not aware of any app optionality.
I note the December ColorOS updates included a bug fix for "low sound when connected to AirPods2 headset".
Would imply this is a wider issue.

I came across the same problem with the WF-1000XM3. I managed to fix it by changing one of the touch functions of the earphones to volume control. Then I just adjusted the volume on the earphones to the max and now I have full volume.

Bluetooth Sound not Loud enough

Hi Guys
Since one Week i got the Huawei P30 Pro and some sony wh-1000xm3 Headset that are connected with Bluetooth. The Volume is way to low and i was wondering if someone has an idea. All the things that are mentioned in others threads where made. I joined the developer mode to change the bluetooth limitation but i didn't saw no change.
I used a PreAmp App but the Sound is getting very crispy and bad as soon i put up the Amp. I'm pretty frustrated because it's not working. With a cheap Headset (JBL 50$) the Music way better and louder.
What i did not tested was the Wired connection between Phone and Headset but i will test that and let you know. Also i had not the time to test with another phone to make sure it's not the headset itself.
Someone got an idea what i can do because i'm playing with the idea of giving back my phone if there is no solution to it.
Thanks in advance for any possible Idea.

activate developer settings, then activate "volume control over bluetooth"

starbase64 said:
activate developer settings, then activate "volume control over bluetooth"
Click to expand...
Click to collapse
Hi
If you read my Text correctly i did that allready. I gave back the Headphones today and got them changed.
Ater that i visited a bik Market and tryed out allot of other models over my Phone + USB-C to 3.5mm Jack and they where sounding awfull. Funny thing is when i got home i tried the ones that came with the Phone and they Sound amazing. They Airpod style and i don't like how i have to wear em but the sound was brilliant.
So i think Over Ears with USB-C will make the thing but it seems to be dificult to find em.

Hey, I had the same problem with those Sony's with my Sammy s9 and never managed to get it fixed but since I got the p30 pro it's been fine. Much better volume now. No help for you but lots of sympathy. I know how bad it sucks.

I have been using the b&o E8.2 for about 6 months now with my p30 pro I haven't noticed any low volume issue sound is just magnificent

Querdenker28 said:
Hi Guys
Since one Week i got the Huawei P30 Pro and some sony wh-1000xm3 Headset that are connected with Bluetooth. The Volume is way to low and i was wondering if someone has an idea. All the things that are mentioned in others threads where made. I joined the developer mode to change the bluetooth limitation but i didn't saw no change.
I used a PreAmp App but the Sound is getting very crispy and bad as soon i put up the Amp. I'm pretty frustrated because it's not working. With a cheap Headset (JBL 50$) the Music way better and louder.
What i did not tested was the Wired connection between Phone and Headset but i will test that and let you know. Also i had not the time to test with another phone to make sure it's not the headset itself.
Someone got an idea what i can do because i'm playing with the idea of giving back my phone if there is no solution to it.
Thanks in advance for any possible Idea.
Click to expand...
Click to collapse
Did you try bluetooth absolute volume enabled? ( I did that for my airpod pro is it's much louder than before you can find that under the developer mode assuming you already have it enabled. Once you enable make sure you restart to get the results.

kienerman said:
Did you try bluetooth absolute volume enabled? ( I did that for my airpod pro is it's much louder than before you can find that under the developer mode assuming you already have it enabled. Once you enable make sure you restart to get the results.
Click to expand...
Click to collapse
Hi
Yes did that and it gets louder but the sound gets dirty not hearable for my ears. I want both things clear and Loud sound.
But i think i got some sort of solution buying a DAC lie the Ibasso oder the Meizu that amps up that stuff.

News
Hi Guys
So i got some News. I had the Chance yesterday to test some Headphones. All the Wireless ones are not Loud enough. Also the ones that i could test with a USB-C to 35mm Jack adapter and a cable from the Shop itself where also horrible to listen to.
I also picked up that USB-C to 3.5mm Jack Adapter from Huawei itself and with my JBL headset the Sound is almost Loud enough and Clear. But i found a Thread in a Hifi Forum and i think the Piece of hardware i need to get some decent Sound is a DAC. That is a Digital to Analog Converter that amps up the Music without distorting the Sound. There are several Models and if someone is interested i would have a look at this thread in here .https://www.head-fi.org/threads/usb-c-to-3-5mm-adapters-dac-lets-find-the-best.908839/page-30.
For me i decided that i give up on that Bluetooth and Wireless Crap and simply get a decent Wired Headphone with a DAC. I think that will do the Job.

There are HTC and Hidisz USB C to Jack adapters available with a built-in DAC. They both work brilliant with the P30 pro

did you notice that your Sony headphones have their own volume? try to "volume up" pressing your headphones
On the other hand, I tried different headphones (airpods pro, freebuds 3, airpods 1...) with Huawei p30 and p30pro, and I had volume troubles with the p30pro, the volume was too low; with P30 the volume is perfect... I dont know why