yashsingh1/xdaforums huggingface dataset:
[MTCD Android Head Units General] skezza:
Sure, why not? If it's worthwhile then I'll join you on that. If it's a home solder job, I'll wait to see how much improvement it gives. I don't mind soldering, I've done plenty of it on harder boards than this, but it's whether it's worth the time and voiding the warranty for :)
[MTCD Android Head Units General] bogdi1988:
Yup! Agreed!
[MTCD Android Head Units General] Jedimindtriks:
Are the prices that different? for me it was kind of the same

xtrons.com TE103AP with shipping: 330€

same unit on androidautoshop.com 330€
[MTCD Android Head Units General] skezza:
Maybe it's based on location. The total amount for me to order the same BMW E90 unit from Xtrons and CarAudioShop, there's about a £70 increase. It actually doesn't have the unit I wanted anyway, only the big screen one. I went for the one with a disk drive.
[MTCD Android Head Units General] Jedimindtriks:
Might be a location thing yeah. Just checked the E90 9" on both, and the AndroidAutoShop one costs 399$ while the xtrons costs 415$ / 320£ and thats without shipping while androidautoshp has free shipping.
[MTCD Android Head Units General] Flemischguy:
I ordered this Radio too for my BMW E 46.

Can you give me the link of that topic on Tweakers?

Thanks!

Ik ben zeer benieuwd ;)
[MTCD Android Head Units General] Jkteam:
i ordered mine may 31st, still waiting for it
[MTCD Android Head Units General] wboops:
hi guys this board looks similar but its not the same board the none dsp board. the dsp has no holes in it for solder the dsp add in card. all the manufactures say you must order DSP before they send out the radio. the dsp radio has more components added then the none dsp board as well
[MTCD Android Head Units General] DragonFlye:
https://gathering.tweakers.net/forum/list_messages/1740515/last
[MTCD Android Head Units General] skezza:
I think we really need to correct some of the terminology here. Some boards have no DSP's. Some boards have built-in DSP's. Some boards have dedicated DSP's. Are you speaking of the early MTCB boards with no holes for the DSP, or the MTCD boards in-which these dedicated DSP's are included?
[MTCD Android Head Units General] wboops:
hi I am speaking about the radio with android 8.0 install none dedicated dsp and dedicated dsp. my friend has a radio with dedicated dsp it does not work that well no sub channel unless he was sold a lemon
[MTCD Android Head Units General] skezza:
So wait..... you're saying those 3 wonderful letters don't instantly turn your car into a magic carpet like from Aladdin?
[MTCD Android Head Units General] wboops:
Hi I stand corrected my friend machine might be faulty. And the dsp really works
[MTCD Android Head Units General] skezza:
So how come this issue with the sub not working is cropping up more and more?

I don't doubt the DSP works. Nobody does. What I doubt is the impact it has on the sound being as vast as people are suggesting here. Anyone would think you're replacing a £20 Home Bargains stereo with a £2000 Bang and Olufsen. I know for a fact that isn't the case. There will be an improvement in sound quality (probably, not guaranteed), albeit minimal. The idea that by fitting a DSP, all these units will blow the current line of PX3/PX5 units with in-built DSP's away is just laughable. Pretty much all current gen MTCD units have a DSP, just not a dedicated one, they have one included in the chipset.

I think people need to read up exactly what a DSP does, exactly what an amplifier does, and the variables that contribute to the quality of sound in your vehicle. Once you've done that, you'll realise why I am so sceptical.
[MTCD Android Head Units General] wboops:
Hi mate so would you say it's not worth it to buy a radio with a dedicated dsp
[MTCD Android Head Units General] zeMadCat:
I have already checked these units and they do have DSP hardware. sound quality and sound chip control is far more superior to the standard units w/o DSP.

Forking the apk and testing on a standard unit did not give the DSP equalizer, but testing a different apks from standard units all resulted in the app to show all the DSP functions.

Looking through the source code you can clearly tell that it will only show those resources if a DSP hardware chip is present!

Also the customer support has tons of knowledge about these units and they got custom firmware for older units (8.0.0 soon to come i hope) with a very nice UI and alot of cool features!

I also read somewhere that they got a firmware chef on XDA that they teamed up with to optimize their software.

All in all i am very satisfied with this reseller, the product and the price is not bad at all.
[MTCD Android Head Units General] blue_racer:
Are there any manuals or functional description for the DSP setup? The seller may no give me any answers to this.

I got an idea, but hope for a detailled description of:

- LUD

- PHAT

- CUT FREQ

- BASS

- SUB

I think some of them are clear, allthough I hope someone may descripe it well.

Also regarding the run time correction. I've only seen two distances (horizontal and vertical), but not for every single speaker and sub.

[IMG="DSP Setup"]https://androidautoshop.com/3249-large_default/bmw-5-e39-x5-e53-7-touch-screen-dsp-android-80-4gb-32gb-entertainment-system.jpg[/IMG]
[MTCD Android Head Units General] Jedimindtriks:
Got to wait til we can test it.

But as the android dev said, is all i can go by at this point.

Almoast doubled the volume, clear sound, much better controls.

But i still have no idea what PHAT LUD etc are. or even do at this point.

So its going to be great seeing how it works when it arrives :)

Anyone smart enough to decode this?

its the datasheet for the DSP used

http://www.analog.com/en/products/audio-video/audio-codecs/adau1701.html#product-overview

28-/56-bit, 50 MIPS digital audio processor

2 ADCs: SNR of 100 dB, THD + N of −83 dB

4 DACs: SNR of 104 dB, THD + N of −90 dB

Complete standalone operation

Self-boot from serial EEPROM

Auxiliary ADC with 4-input mux for analog control

GPIOs for digital controls and outputs

Fully programmable with SigmaStudio graphical tool

28-bit × 28-bit multiplier with 56-bit accumulator for full

double-precision processing

Clock oscillator for generating a master clock from crystal

PLL for generating master clock from 64 × fS, 256 × fS,

384 × fS, or 512 × fS clocks

Flexible serial data input/output ports with I2S-compatible,

left-justified, right-justified, and TDM modes

Sampling rates of up to 192 kHz are supported

On-chip voltage regulator for compatibility with 3.3V systems

48-lead, plastic LQFP
[MTCD Android Head Units General] skezza:
Jedi, when it comes, let us know what you think? Obviously you can only go on your experience with that unit so it'll be hard to compare, but just be as honest as possible.
[MTCD Android Head Units General] skezza:
Any update on this?
[MTCD Android Head Units General] Jkteam:
mine got shipped this morning:)
[MTCD Android Head Units General] blue_racer:
My Ideas:

- LUD: slew rate for high/low pass filter in dB

- PHAT: no idea

- CUT FREQ: frequency for high pass filter for speakers

- BASS: F => frequency for low pass filter for sub / G => no idea

- SUB: gain for sub output

I'm also on the way to order such a radio.
[MTCD Android Head Units General] skezza:
Keen to hear a comparison with a stock PX5. Actually, what I really want to know is the amp chip, but I doubt anyone has dismantled one yet.
[MTCD Android Head Units General] canislupus01:
I think you're thinking of this thread:

https://www.reddit.com/r/CarAV/comments/8m2a4z/sound_quality_on_china_android_head_unit/

Code is in there.

---------- Post added at 03:13 PM ---------- Previous post was at 02:32 PM ----------

G=Gain
[MTCD Android Head Units General] skezza:
There's some serious dross in that Reddit thread.

"**** in **** out, amp wont improve sound quality. "

Completely inaccurate. All depends on what signal is received by the amplifier. If it receives a clean signal, then a good amp chip (or external) will absolutely improve sound quality over a bad amplifier. If it receives a **** signal, then agreed, nothing you can do. Think of it like a powered speaker. A good powered speaker can make a good signal sound fantastic. A good powered speaker will only be able to make a bad signal sound bad, because it's a bad signal. A bad powered speaker will make a good signal sound bad, and make a bad signal sound worse. If it was as easy as this dum dum is putting it, then everyone with a 100 quid starter guitar and amp kit would be able to get a sound like Gary Moore.

This is why I'm not convinced people are understanding the problems at hand correctly. Too many Wikipedia experts without the background knowledge. There's a signal path, and it's about identifying where the sound fidelity is being lost. If the units themselves are processing audio 'wrong' or 'badly', then why the heck do USB DAC's work? Yes, the USB DAC will use a different interface and driver but I very much doubt there's a whole tonne of software processing going on in the OEM audio chain either. This is a misnomer. To put it in basic terms, you've simply got a signal chain and at some point the audio is being distorted or compressed or losing fidelity. I've said for years the biggest problem with the Joying and cheaper units are the amp chips. Low and behold, people who have replaced the amp chips have said the sound quality massively improves. No need for a DSP dong or even much software EQ'ing. Just changing the amp was enough to bring a massive improvement. I suspect that there is limited processing on the audio chain, but the amp chip is probably reproducing 50-70% of the original signal. This isn't uncommon and isn't even isolated to head units. Most mobile phone headphone jacks deliver around 85% of the original signal. The only phone I can think of which did it better was the original Galaxy S i9000 (yep, we're talking old). Samsung included a Wolfson Micro chip which delivered a very good spectrum, like 96% reproduction I believe.

This is all about ensuring the signal that is subsequently sent to your speakers is clean and good quality. The best that can realistically be delivered. A DSP alone won't do that. A better amp won't do that. It's a whole combination of things, and people are just failing to comprehend that. At some point, you have to give up the ghost and just assume stupidity.
[MTCD Android Head Units General] Jedimindtriks:
We get it. you dont like DSP.

luckily for us who got the unit and tried it the sound is just on a whole new level compared to old units.
[MTCD Android Head Units General] blue_racer:
I do more think we live in two different worlds. Maybe he is more audiophil than us. :good:

I'm looking forward to the radio. Had a Kennwood KDC-BT92SD with DSP before... the sound was just great!

Let's see what they'll do with it.
[MTCD Android Head Units General] gtxaspec:
I wonder if anyone can compare the MTCD/E units with the DSP to the joying FYT based units with DSP? The thing I dislike about the various MTC* units is the build quality is really bad most of the time.
[MTCD Android Head Units General] marchnz:
And they're somehow different to the JY/fyt units?!?! Seems anecdotal. Consider that the hardware can be perfect while the software is fundamentally flawed...as is both HCT and FYT.

Re. DSP, sounds like some have drunk the marketing cool aid. It simply isn't necessary -I recall the last big 'JY' innovation was the class D 'digital' amp, I mean really does no one actually understand this stuff? Seriously.

See my thread for a quality JY unit where the case post would have eventually shorted against the mainboard.

Can you honestly say the PX5 JY Fyt are not simply ripoffs of the HCT units...they have the identical architectures, peripheral components and like software components.
[MTCD Android Head Units General] gtxaspec:
No way... The build quality (pcb) from what I've seen, as well as software (both platforms are bad, fyt is less bad) is much better than the HCT stuff... My personal observations.

The architecture might be the same, px5, but the PCB and software design are different implementations. Some have great experiences with the mtcd stuff, I have not so far after ( maybe 6 mtcd HUs) I stick with fyt for now.
[MTCD Android Head Units General] marchnz:
It's called placebo affect. You've drunk the cool aid just as the others did that brought the JY Digital amp that thought and believed they were getting something above what the standard units already deliver.

Without facts, audio analysis etc, it's all fuzz.
[MTCD Android Head Units General] skezza:
:laugh::laugh::laugh::laugh::laugh::laugh::laugh::laugh::laugh::laugh::laugh::laugh::laugh:

I used to work for a company that writes software, and manufacturers hardware............ specifically DSP's you clown. What I am trying to ascertain, and as yet, am unable to get a clear and straight answer, is the actual improvement. So far I've got you:

"yeah it'll sound better because my MTCB one sounded terrible" - yeah, not a valid or scientific comparison.

"yeah it'll sound better because DSP" - feels

"yeah it'll sound better because the nice chinese man said it would" - not valid either.

You can't just assume it'll sound better, that's my point. It goes over your head every time, but there we go.

---------- Post added at 11:19 AM ---------- Previous post was at 11:03 AM ----------

So far, I'm not convinced a single person in this thread (excluding myself and you, without sounding arrogant) have a ****ing clue. I put in phrases for them to Google and read up: "signal chain" etc, but still it goes over their heads

"DSP ORSUM BRO, SO KEWLLLLLLLLLLZ, I GOT SOME £8 AFTERMARKET PARCEL SHELF SPEAKERS FROM HALFORDS THEY'RE ORSUM TOO"

If Apple did nothing else but stick a t in front of their iPhone and called it the tiPhone, some people would still buy it. I suspect the same is true here.

I am still confident that sticking a stock PX5 unit next to a DSP one, there will be almost no difference in overall sound quality, but with some tweaks you might be able to make the DSP one sound a little better. Same amp chip, but the same signal chain pretty much. If the DSP units contain a superior amp, then that is when the game changes, but so far nothing suggests that is the case.
[MTCD Android Head Units General] dicabkl:
Hi, how much time to get it shiped? I ordered on 17 june and it says stil processing. Thanks!
[MTCD Android Head Units General] Jkteam:
Offered mine may 31 and will receive this Friday.

Apparently some delays because of number of orders

Also DHL couldn't find my address.

I am in Canada
[MTCD Android Head Units General] dicabkl:
Not happy at all, they said 2-7 days for delivery from UK deposit. I ordered on androidautoshop.
[MTCD Android Head Units General] Jkteam:
someone earlier on another post said he order and 3-4 days after did receive it

So maybe my situation was just an exception.

I also know that when androidautoshop was brought to xda (on the xe706pl tread), the site i think did receive a lot of demands. (that's my guess)

will confirm when i receive it
[MTCD Android Head Units General] skezza:
2-7 days isn't bad really? 7 days will be worst case.
[MTCD Android Head Units General] dicabkl:
They have answered that there is a delay for all DSP units. One week. I am waiting.
[MTCD Android Head Units General] marchnz:
Bravo! My dear old granddad would say " A fool and his money are easily parted."

Looks like this "local" reseller is simply drop shipping or is the reseller with a based postal.

I would suggest anyone considering buying from "AndroidAutoShop.com" be very careful. Their policies and details are fluff and almost non-existent.

Consider asking questions regarding where their physical location/office is, where the product and warranty is fulfilled from, where the claimed "support" and repair centre resides, who pays for freight for warranty, etc.

Beware!
[MTCD Android Head Units General] skezza:
I'm happy to be proven wrong. I just don't think I will be.
[MTCD Android Head Units General] Jkteam:
Yes they web site looks skeatch but it's a new one. nothing on facebook etc. Take some time to search and you will see the real company behind, fb is alive, there is a antoher webiste, physical shop, number to call and to talk to them etc
[MTCD Android Head Units General] Jedimindtriks:
I just got my order from them tho. talked to them on facebook and email.

unit works fine, sound is great and im happy.

the only issue they had was that the DSP units are delayed. since right at this moment, they are the only ones selling these.
[MTCD Android Head Units General] Jedimindtriks:
What kind of unit did you order? i ordered a volkswagen 9" and it was fast. around 11 days from order to arrival.
[MTCD Android Head Units General] wboops:
hi mate have you connect a subwoofer to the sub port. and is they sound coming from subwoofer channel
[MTCD Android Head Units General] dicabkl:
I have ordered an 8" cls unit, identical with xtrons, model PE88M211PL, with trapezoidal fascia. I will keep you updated with delivery, instalation and some opinion.
[MTCD Android Head Units General] Jedimindtriks:
I did not test a sub sadly.

What i can say regarding sound is that its a bit clearer. as if it makes the speakers sound better than the original. and the volume is about 50% louder so i dont have to ramp up the volume as much.
[MTCD Android Head Units General] Jkteam:
received mine Friday. Will start installation 2day
[MTCD Android Head Units General] Flemischguy:
Keep us updated about your findings.

I will receive mine tuesday.
[MTCD Android Head Units General] Jkteam:
Will do.will take some time to install not very good with this kind of stuff
[MTCD Android Head Units General] skezza:
Still waiting for feedback on this then. I suspect the subwoofer bug is just a SW issue and will be fixed.
[MTCD Android Head Units General] wboops:
Same here. I did had a 10.1 with DSP purchased from a seller on aliexpress which had a problem on Sub channel. these radio might be from a different manufacture which might not have the sub problem. so weighting on you guys for your feed back
[MTCD Android Head Units General] skezza:
I've not bought one myself. I'm not convinced that their sound will be dramatically better, but it's up to those who have purchased them to give the verdict. Big problem is, they probably don't have another unit to compare too
[MTCD Android Head Units General] wboops:
i had an XTRONS 10.1 android 8.0 which sound really good the problem was that the bluetooth stop working with in a few days of getting the radio. i then purchased a dsp from china but the dsp radio was faulty on arrival . i had to return that radio. so weighting for you guys to see if every thing it ok with these radios
[MTCD Android Head Units General] skezza:
Wow that's some real bad luck. So far, I've been very lucky. My Xtrons has worked great. When the bluetooth stopped, did you try any kind of diagnostics? Factory resetting your phone? the unit? Trying another phone?

I suspect the DSP unit was damaged in transit. I've seen how postage people work and they often throw packages around like they're worthless.
[MTCD Android Head Units General] wboops:
hi i did try every thing include a factory reset still no luck. but the factory reset do not reset the hole radio software on the radio. i realise after sending the radio back in factory settings they was other option to change. as that was my first unit i did not know much about the radio. the radio with DSP was definitely faulty no sound from the sub channel at all. i all purchased Internal TPMS and DAB i just send back every thing to china
[MTCD Android Head Units General] skezza:
The sun channel? Sub channel?
[MTCD Android Head Units General] Jedimindtriks:
Im gonna guess its bad hardware. software doesnt have anything directly to do with the SUB except for that one place in EQ where you can control it. which is again bound to HW.
[MTCD Android Head Units General] Jkteam:
Ok guys so I didn't finish everything.all the wires are plugged and bakc up camera too.

Didn't try microphone yet(have external one wiating in case) and didn't try GPS.

Will install TPMS tomorrow..

I quickly checked the radio works well and sound is very good and didn't optimize it yet

Obd2 did connect right away.

Will keep you posted tomorrow

But I think I will be satisfied with it
[MTCD Android Head Units General] dicabkl:
Any photos or videos from installation+
[MTCD Android Head Units General] Jkteam:
videos or photos when installing no. Just followed the instructions for my car.

All the walkournd for exemple taping the reverse to parking brake etc was done because of previous stereo so it was just connecting the wires.

will take some pics today but it's not done
[MTCD Android Head Units General] chriscole:
A word of warning on this lot - despite website claiming that they ship locally from the UK, my order actually got sent from HK and have been stung on additional import fees from DHL as a result.

No response at all from the seller when I questioned them on this either.
[MTCD Android Head Units General] Flemischguy:
It seems a lot of buyers has to pay the import fee, mine was also shipped from Hong Kong and had to pay 43 Euro
[MTCD Android Head Units General] AndroidAutoShop:
Hi everyone. We just got notified about this thread and figured we would respond.

All DSP units currently only ship from HK. We are sorry that this was not made clear and that our wiki page had the wrong information.

We also want to say that because of the many orders placed the past months for DSP units, we have had a delay in production, while non-DSP units have a production and shipping time of 2+3 days. at the moment DSP units have 7±3 + 3 days production and shipping

As the only supplier of DSP PX5 units in the world right now, we are experiencing massive attention to our products that we had not anticipated.

We will also talk directly to customers if they have anything they want to say, please do not hesitate to contact us. we are here to provide support for you and we are eager to hear any feedback, be it positive or negative.

Thank you.

AndroidAutoShop team
[MTCD Android Head Units General] TBM2:
You just got notified? Sorry, but I find that hard to believe.

From my findings I believe androidautoshop.com and graviton.no are related. Graviton has an actual postal address (based in Larvik, Norway) and a tax number on their website as required by Norwegian law.

Member Jedimindtriks has some kind of connection with both companies and member zeMadCat has some kind of connection with Android Auto Shop judging from the posts here and lives in Larvik according to the profile.

Now Larvik has only 46,000 or so inhabitants. May all be a coincedence....

I was looking into buying a HU but these findings and the (mis)information on the website make me think twice about doing business with you.

Why not being honest and open about your business in the first place?

btw There is also an option to pay extra for tax free shipping in the checkout process. Is that guaranteed?
[MTCD Android Head Units General] gtxaspec:
Just get a joying unit with the DSP if you are weary...they are the only other "known" vendor of units. Just to suggest an alternative option lol.
[MTCD Android Head Units General] wboops:
Hi guys can you send me postage address from your sender DHL packace I am very suspicious as well.
[MTCD Android Head Units General] TBM2:
Thx. :)

Unfortunately, Joying does not have a vehicle specific HU for my car - and I don't like that enormous logo, but that's probably just me. lol.

There are other 'brands' of course but they do not offer PX5 4/32 units with Android 8 yet. Hardware DSP is not a must have imo.

Of course, I could order from AliExpress but that's not the point.

I don't have a problem ordering from these people - afaict everyone (eventually) gets their HU - but they just need to be clear about things.