yashsingh1/xdaforums huggingface dataset:
[Android Head-Units] ziddey:
Why would they be on one channel? You have rear left/right pre-outs. Yeah, I didn't realize the fyt 7862s came with fans until I saw your unit. I'm guessing it didn't really need it originally when it used the tda7851l dac, but now that they've silented switched to the tda7838, there's overheating issues. I just got mine the other week, so I'm pretty sure it's got the tda7838. Maybe next time I pull it out, I'll rig a fan on there (unfortunately I gotta take a ton of dash panels off to get to the headunit in my car).

As for the line driver, apparently it's been a standard issue of these headunits for years, including the latest fyt/ts10 7862s from what I've read. I didn't measure my output, but it's said to produce only 0.6v. I didn't try my proper 12" sub/amp combo; this is a tiny hatchback that I'm not willing to sacrifice any space in, so I'm just using a powered underseat alpine 8 incher. Didn't get any meaningful output with both the sub volume maxed out at 10 and the amp gain maxed. Same with using the left/right pre-outs. Used a household dac via optical while I waited for the line driver, which was underwhelming but almost passable. Got the line driver in the mail today and it's performing far better than I was expecting for an underseat sub.

I was hoping to use the headunit to control the lpf / hpf (subsonic), but it doesn't seem to be working properly at all. For example, if I set it to <250hz, I seem to lose all bass (seems it works in reverse??). So I just have it set to passthrough and have the amp set to around 90hz.

With the line driver at whatever gain it came preset at, and my sub amp gain set at 50%, sub volume of 2 is pretty spot on, 4 is as strong as I'd like, and any more is excessive (maybe I could lower the lpf a bit, but it's an 8 incher after all)

There's a bunch of threads about low pre-out voltages, mostly for older gen units and I was hoping it'd be addressed by now, but apparently not. e.g. https://xdaforums.com/t/px6-subwoofer-volume-very-low.3945752/

edit: For G:

ill: illumination

back_con: reverse signal? (for the backup camera)

ad2_in/ad1_in: i believe this is key1/sw1 / key2/sw2. For non-canbus steering wheel controls (resistor network style). Also you short them or something when throwing the device into diag mode or something?

Strange that the reverse wire is on the main dongle, but the actual plug for the camera has brake and ir wires? I'll probably get a camera in the future, but not really interested in running the wires at the moment.

Also, if you haven't checked this thread out yet, it's a zoo of information on our units: https://4pda.to/forum/index.php?showtopic=1000996

Lot of good topics linked from the original post, but I'm sure there's so much more buried in the pages. A bit hard to search since I'm using a translator.
[Android Head-Units] CaliBurr:
Each channel would have to be on a seperate signal if you want to adjust timing, no? If I only have one RCA going into my amp both channels will be the same, right? Looks like my canbus settings are on The C port as well CAN_CX and CAN_RX. I would need a mini 8 pin iso to RCA out and the CANRX and CX AND RST_ wire. They won't provide me with this cable.

On another note, do you know how to switch to AUX in? It is not an option on the stock music player and it doesnt seem there is a seperate app for it...
[Android Head-Units] ziddey:
I've never tried aux in, but I have an app for it. Saw the other thread, and I don't have any cameras enabled, so maybe that's why.

As for the pre-outs, there's left, right (presumably front), rear left, rear right, and sub. How are you planning on hooking just one channel?
[Android Head-Units] CaliBurr:
Yes but I only have front left right pre outs and sub and I am trying to hook up an amp for rear component speakers. My amp is a two channel amp but only has one rca signal input so my rear left and rear right speaker will each go on one channel.
[Android Head-Units] sundiver:
Interestingly, I'm fighting with this now in another thread. I was using a 2 din Atoto unit with built in SPDIF out and things were great. I had to switch to a single din motorized head unit to make room for another device. The new head unit only has analog out. I got it all hooked and and.... this... doesn't... sound... right.... I don't have a spectrum analyzer, but the sound from the analog outputs is noticeably off compared to digital, and I can only get my USB->SPDIF adapter to work with Neutron audio player. Everything else will only go to the analog outputs.
[Android Head-Units] CaliBurr:
It

That's bizarre. Did you have to change settings in neutron to get your USB to spdif to work? I tried neutron because I heard good things but hated it... took forever to compile my 1tb music library. I am using vanilla and foobar2000 but foobar seems to be skipping on lossless tracks. I know it's not my Sandisk Extreme 1tb read speeds because vanilla music reads it fine. I tried setting it to pre buffer the tracks but it isn't working. I want to use optical out but I can't find a dac that doesn't convert the signal to mono outputs and I don't want to convert mono to stereo with a y adapter. What amp are you using that has optical inputs? They are all like 1k plus. Was your optical signal 5.1 or stereo?
[Android Head-Units] ziddey:
Ah if you can't get the harness for the rear output, you'll have to make one yourself, or repurpose some of the other rca plugs if you're not using them. It's pretty easy to press down on the locking tab to pull the wire out. If your prebuilt harness has a canbus decoder, it should at least have the plug for that block at least. Just need to add more wires to it.
[Android Head-Units] sundiver:
I had to select "Direct USB Access". Beyond that I didn't mess with it much. I was just using it to confirm that my USB->SPDIF adapter was working. It's not of any use to me unless all audio (pandora/waze/radio/phone/notifications) goes out via SPDIF.

I'm using an Alpine PXE-0850s dsp/amp. I think it was $600 list, I got mine open box for $300. Optical out from my Atoto head unit was stereo. I used the PXE-0850s to extract a subwoofer channel.
[Android Head-Units] sundiver:
So this is interesting.. Spectrum of pink noise from the same speaker and amp channel, source from the front RCA outs on my Jeta Industries head unit, rear RCA outs, and bluetooth direct to the amp. RCA outs differ from bluetooth, and the front and rear RCA outs are different. What the?!??!? Recorded with a Denon Audyssey calibration mic. Not sure if that's the right thing to use, but it's the only possibly decent microphone I had.

Front

Rear

Bluetooth
[Android Head-Units] CaliBurr:
Lol which head unit. Very little difference but you can adjust those things in settings on my head unit. The problem I am having with mine is the subwoofer controls in android settings and equalizer are reversed so when I change the low frequency in android it changes the high frequency in equalizer. Xmeched my subwoofer.
[Android Head-Units] sundiver:
This head unit.. https://www.aliexpress.com/item/400...exp_id=ae39d680-66cf-4f16-8f16-8ac84f9801fb-0

I guess the spectrum doesn't look all that different, but the difference in how it sounds is dramatic. Front RCA too tinny, rear RCA to muddy, bluetooth just right. Mixing the front and rears together is better, but still not nearly as good as digital to the amp. The head unit has an adjustable equalizer, but it seems global. There isn't a separate eq for each channel. I tried correcting the sound using the equalizers in the amp, but I couldn't get it to come close to how digital with a flat eq sounds.

With the analog outs of the head unit vocals in songs seem to disappear into the rest of the music a bit, where with digital to the amp and a flat eq the vocals stand out more.

I really need a single din flip up screen head unit with digital out, but I can't seem to find one.
[Android Head-Units] CaliBurr:
Do you have a bluetooth amp or some sort of adapter? I just got one of these like @Bob_Sanders has should have it tomorrow... Bob how do you like your line driver? It was between this, the audiopipe which has 3 inputs and 3 outputs, the installbay which is only $20 but has no remote wire, and the LC1i which is $20 more than the already too expensive one I got. https://www.amazon.com/CERWIN-IOEMHL-2-Channel-Output-Converter/dp/B00P25VU84

My amplifier has what they call a narrow "Q" peaking equalization circuit set at 45hz nut allows up to 12db of bass boost with a dial. Isn't this essentially the same as a line driver? Increasing voltage from 1.5v from head unit to 8v which is the maximum for my amp. That's why i picked the Cerwin Vega because the rest said they increase it to 9.5-10v which I assume wouldnt matter much but I have read it can cause the amp to clip or mess up. Why don't they just build these android units to audiophile standards DAMMIT!
[Android Head-Units] CaliBurr:
What do you have your bluetooth settings on? I had to change mine to be Qualcomm aptX and change the resolution to high and sampling rate or whatever in factory settings. Didn't think about using bluetooth audio output though, that is from my phone to my unit.
[Android Head-Units] sundiver:
This was from my phone, with "Use System Selection (Default)", direct to the amp, an Alpine PXE-0850s. Same pink noise generator app on the phone and head unit, and Poweramp/Pandora on both for testing music. But the bluetooth audio sounds fine. It's the analog outs from the head unit that are crappy. I'm going to try the speaker outs from the head unit (the amp has high level inputs) to see if there is any difference, but I don't expect it to help.
[Android Head-Units] CaliBurr:
Changed my Amazon order to this:

https://www.amazon.com/gp/product/B...2&pd_rd_w=tu5K2&pd_rd_wg=2o3JT&ref_=pd_gw_unk to see if I can amplify both the subwoofer out and rca out but good to know bluetooth is an option... If my head unit will send audio over bluetooth to an adapter. What bluetooth adapter are you using? Or your amp has bluetooth?
[Android Head-Units] sundiver:
The amp has bluetooth built in. Used both for audio streaming and configuring the amp.

I don't think bluetooth out will help you. The only head units I know of that can do bluetooth audio out are the ATOTO ones, but they also have SPDIF, so why bother with bluetooth? Also bluetooth out (but not SPDIF) bypasses the head unit volume control for some sources. The volume adjustment worked for AM/FM radio, but Poweramp and Pandora just played back at full volume. I nearly blew out my speakers because of that.
[Android Head-Units] gottahavit:
just to confirm, you aren't using bluetooth to the head unit as your audio source? BT audio on these things is even more riddled with audio problems than the RCA/spkr outs. If looking to diagnose sound I'd use a solid FLAC source or if necessary high bitrate MP3.
[Android Head-Units] sundiver:
Bluetooth from phone direct to the amp. And while I didn't check with the spectrum analyzer, subjectively phone->bluetooth->amp has the same sound as I was getting with old head unit->SPDIF->amp. And also similar to old head unit->RCA->amp. The new head unit->RCA(and speakr)->amp is definitely off. And even if bluetooth isn't a good comparison, the front and rear outs of the new head unit shouldn't be different.
[Android Head-Units] CaliBurr:
I can't find the voltage output of these little DAC DECODERS, but it looks like they are powered. I have toslink and optical spdif but not sure if it is 5.1 or 2 channel. I want 8v into my amp. All the DAC preamp and converters I am finding for under $100 are 2vrms out on the RCA. Here is one with 4.2v output but then I need to convert 12v to 5v to power. https://www.amazon.com/Soundavo-HP-...uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl
[Android Head-Units] gottahavit:
I was referring to the source for the HU, I know you have BT to the amp. Regardless the Front and rear could be very different depending on the setting for the surround sound in the HU. I am not sure how you completely disable that processing.
[Android Head-Units] CaliBurr:
Damn, this unit worked wonders. The remote knob controls the voltage of my signal now.

Amazon.com

I was missing so much power from my amp. I recommend this to anyone who has an android head unit, and no I am not an affiliate.
[Android Head-Units] sundiver:
I suspect that's the problem. Even with the EQ set to flat, all special effects off, and the sound field set to "Normal" it's still probably trying to do some surround sound something or other, and doing a bad job of it. I guess I need a single din unit with SPDIF, but I can't seem to find one.
[Android Head-Units] gottahavit:
Joying has a ton, mine is a single din with optical.

Android CarPlay Single 1 Din Car Radio Navigation System - Joying

Joying best Android 10.0 single din car stereo head units have a standard size of 178mm x 50mm with different size screen for your choice like 7", 8" and 10.1" which can fit the majority of vehicles such as BMW, Dodge, Fiat, Citroen, Mazda, etc. It's easy to replace with our single din car stereo.

www.joyingauto.com
[Android Head-Units] sundiver:
It needs to be "real" single din (or at least close), with either a flip up screen or screen not much bigger than the single din slot. Otherwise it will overlap with a bunch of controls.
[Android Head-Units] sundiver:
I decided to make some proper frequency response measurements, going line out of the computer to aux in on the head unit, and line out on the head unit to line in on the computer, first calibrating the computer's line in and line out in loopback.

Red is the front outputs, dark green is the rear outputs, and light green is the subwoofer.

What's up with that?
[Android Head-Units] zigzag69:
Is this the harness you used to connect to the booster? https://www.amazon.com/Dasaita-Andr...&pd_rd_wg=GPYQc&ref_=pd_gw_ci_mcx_mr_hp_atf_m
[Android Head-Units] zigzag69:
@CaliBurr so I got the cable and attach the line driver and the RCA preouts are awfully quiet, even with the line driver. I can’t find any setting in my Dasaita that will enable me to turn the volume up.
[Android Head-Units] CaliBurr:
Unfortunately I just hooked my single front RCA out to the Line Driver/Booster. Mine boosts it to up to 10v. I havent tried getting a rear signal, if I did I would probably use optical/spdif with a DAC or a cheap LOC. I guess the voltage is so low i could just connect directly the wire to rca.
[Android Head-Units] zigzag69:
So I’m an idiot and didn’t realize I still needed an amp for the front and rear speakers lol all works well with the sub outputs though! and I’m sure it does with the front and rear
[Android Head-Units] unibomber:
Is this

PAC LP7-4 L.O.C. Pro Series the same as the audio pipe? Line driver and line out converter?​

I mean I have a factory deck with two aftermarket amps. I'm gaging if this will have the same sound output as the sygav or another with a line driver
[Android Head-Units] Djshadeewayz:
Hello everyone, this is my story. I cannot live without a sound system in my cars. Its the first thing i put on a car. I put in a system before i put any miles. And im cheap too i always try to get the most for the least money possible. The most impotant feature i like in my sounds is the ability to adjust frequencies and volumes because every song is different there is no one size fits all when i come to sounds. I recently found an xtrons android ccc HU for my BMW e60 at my local junkyard. I had retrofitted the cic so i had to get it complete with eom ccc and trims and all, the total came up to $250 not bad. Anyway i have 1 L7 15inch kicker with an epicenter and a class D amp with control knob connected to a highs to low adapter hooked up to the subwoofer amp output of the beemer stock hifi audio system. For some reason. Bmw reduces the bass or something from the aux input so the sound from android HU sounds like the word that rhymes with cap. With all the fuctions and technology this HUs have, i find it impossible to believe these people did not include a simple pre out rca output with option to be set as sub out. Like who was the genius that said im gonna make the best aftermarket head unit with the worst options for aftermarket sounds. Its common sense. Make it compatible, make it practical its an aftermarket. I shouldnt have to add extra components to make it sound decent.. but thats what i get for owning a bmw smh. Good thing i have my 1989 toyota pick up with a nex double din pioneer with all the android auto and stuffs. Of course an epicenter class D mono mini amp pushing 2 12s shallow mount pioneers behind the seats. And let me tell you my S****t bangs. Maybe for other setups the android works better but for the bmw e60 its just not there yet. In my opinion
[Android Head-Units] Killahkevin:
I figured out a way to run your subs and amp to an android head unit!!!

So after ordering this cheap 10.1 inch android 11 head unit off Amazon for like 150$ I was excited about being able to use CarPlay and download a bunch of apps on the Google play store, and overall the size of the screen. After connecting my amp and subs to it my amp would turn on but nothing was coming out of my subs so that led me to think I blew my subs and tried various different subwoofers but still no bass. It did not make any sense to me, I knew everything was wired correctly. I like when something doesn’t work as intended therefore I have to figure out a way to make it work right, so I thought about it and accepted the challenge. I then checked my system with a multimeter and confirmed power was running to everything so I had to take a step back and think what else could be the problem. After re checking all of my wires and connections, fuses and just about everything you could think of I decided to check the reviews on Amazon to see if anyone else had this problem and kept seeing posts about looking in the factory settings or downloading an equalizer, but that didn’t do anything. I ended up finding this post about how the RCA outputs can’t handle the voltage or process it or something of the sort. I was just about to give up/take this as a loss and save up for that expensive head unit someone here posted, when I came across this DS18 BT Two Bluetooth receiver. It was about $56 US. And let me tell you, my subs are slapping in my truck now. Connect this receiver straight to your amp by a yellow constant, black ground, red switch power, and blue remote. It also has RCA input wires. Once you turn your key it comes on. You connect to your phone by Bluetooth then all you have to do is connect to your head unit by CarPlay and Boom!!!!! You can now hear the music from your door speakers, as well as your subwoofers kicking. All running through your aftermarket amplifier. Maybe this was a little off topic but after seeing someone put that you need a crossover and an equalizer and a whole bunch of other stuff that’s gonna cost you upwards of 6 to $800 I thought that maybe $56 isn’t so bad for being able to use this cheap Chinese head unit with your custom sound system. I’d be glad to post a video or something to prove that this works just let me know and I hope this helps anyone that had this similar problem.
[Android Head-Units] openupitsdave:
Do you know if there is a way to not have to connect your phone via bluetooth?

I would buy that BT unit in a second if only there was a way to have it automatically connect to my HU when I turn on car... The fact that you have to connect your phone is just silly...

Do you think my chinese Android HU's RCA output voltage is enough for my 90Wx4 amp? Or are people only recommending alternative methods for sub and multiple amp setups?
[Android Head-Units] BadBiscuit:
I'm in the same boat. I need a second pre-amp out for the rear, and it appears to be on the mini 8 pin "canbus" C plug on pins 3 and 4. That cable was not included with my android deck and seller seem unable to provide it. I can't use canbus with my older vehicle, but need this plug for the second amp. What is the best way to go about obtaining such a plug or harness that includes one?

Android unit in question is this AINAVI unit.

Might the 8 pin plug on this harness work for building it? or is there a better way to go?
[Android Head-Units] tebukan:
Friends, I have a ts10 android unit. I have a 5 channel amplifier. I connect 4 speakers and a subwoofer, but I cannot get sound from the subwoofer. The other four speakers are active. What do you need to do to use a subwoofer?
[Android Head-Units] kirilkushev:
Hello, I have an EKIY T7 which I connected to an external amplifier Blaupunkt GTA 270 from the subwoofer output using a Y splitter. The signal from the device is very quiet even though I have turned it up all the way. Will this work?

https://www.aliexpress.com/i/2251832815238008.html?gatewayAdapt=4itemAdapt
[Samsung Galaxy Note 9 Guides, News, & Discussion] koragg97:
Samsung said that all flagships after and including the S10 will get 3 years of Android OS updates. It's a bit unfair for us Note9 and S9 users so I created a petition to Samsung asking them to reconsider adding the S9, S9+ and Note9 to the 3 year major updates support program as well. Here's the link: https://www.change.org/p/samsung-give-android-11-oneui-3-0-to-galaxy-note9-s9-phones

The more people that sign it the better chance we have of Samsung acknowledging it!
[Samsung Galaxy Note 9 Guides, News, & Discussion] KingVekxin:
The petition won't do anything. I truly hate being that person but there's no way in this world or the next that a petition on xda will make Samsung ad an older device to their new statement. It's not smart for their business, gives them no real benefits or anything. You gotta realize they aren't thinking of the handful of us who still hold onto the 9 series of phones whether it be S or Note... Their business is to sell new electronics not to keep old ones on life support that they keep recharging every so often.
[Samsung Galaxy Note 9 Guides, News, & Discussion] koragg97:
Don't worry, I know we 99.9% won't get it. Just decided to explore how this works and made it as another xda user requested it. I'm ok with 2.5 as I just want wireless DeX - other stuff is a bonus that's in 2.5.
[Samsung Galaxy Note 9 Guides, News, & Discussion] TokedUp:
Please stop. Please.
[Samsung Galaxy Note 9 Guides, News, & Discussion] JOSHSKORN:
I feel like a petition might work for an iPhone, because, well, you either have an iPhone or a thousand variants of an Android phone. Having one of two out of those thousand variants doesn't amass to a whole lot of people, certainly not enough for Samsung to actually do something about it. Good luck, though. I did sign it. But again, it's more than likely a lost cause. The three year deal didn't start until AFTER the Note9.
[Samsung Galaxy Note 9 Guides, News, & Discussion] oddbehreif:
Feels like we need to have this same conversation once every smartphone generation. Recap:

Breathing life into old electronics is not good business. Samsung is a business, they're in it for the money. Introducing new features for old phones will not sell new hardware; if anything, it will cause Samsung to sell less new hardware. Less sales means less revenue. That's why it's bad for business.

Developing software for additional platforms consumes more resources; resources which could be used for advancing development of newer hardware, and better software for said newer hardware. Again, why waste resources into something that will cause you to sell fewer next-gen phones?

Let me reiterate. Samsung is a business. They will not make poor business decisions to benefit users who hang on to old hardware instead of buying new hardware. End of story.
[Samsung Galaxy Note 9 Guides, News, & Discussion] koragg97:
[MENTION=4871138]oddbehreif[/MENTION] As I said before I don't have much hope but seeing how the S10s got 3 years support and the Note10 Lite is THE SAME PHONE as the Note9 and will get Android 11 I decided to make this. I'll be perfectly happy with OneUI 2.5 as I'll get wireless DeX then but it's fun to see how change.org works and to spam the link on every Samsung or smartphone tech video and watch the numbers rise. :)
[Samsung Galaxy Note 9 Guides, News, & Discussion] yuskhayru:
It will not working.