CarPlay Retrofit in PCM 3.1 Cayenne 2013 ( With Pictures )
08-11-2021, 03:43 PM
#901
Based on the other posts I've read, it appears the CarPlay board doesn't provide a USB digital audio output. It seems the only audio signal the CarPlay board outputs is an analog one, which is why it's necessary to select the AUX input. If it did provide a USB output, presumably the board's designer would have used that instead of AUX for the audio. [Caveat! All of my thoughts are based on what I've read in these posts, because I haven't yet gotten my hands on any of these CarPlay units (my iSudar board is on order). My apologies if I'm re-plowing old ground you guys have already turned over.]
The fact is it provides USB port and usb is digital. USB can carry video and audio both ways.
My guess is the kernel is not setup to send audio via USB. However konkab did say it looks like the kernel is setup with relevant drivers for a USB audio card. So I assume from this the board can route audio down the USB if it detects an audio card. It's then just how do you route that audio back to the PCM3.1 (IPod emulator again which konkab has and could of the chip is not write protected lift the code off)
08-11-2021, 05:17 PM
#902
The fact is it provides USB port and usb is digital. USB can carry video and audio both ways.
My guess is the kernel is not setup to send audio via USB. However konkab did say it looks like the kernel is setup with relevant drivers for a USB audio card. So I assume from this the board can route audio down the USB if it detects an audio card. It's then just how do you route that audio back to the PCM3.1 (IPod emulator again which konkab has and could of the chip is not write protected lift the code off)
My guess is the kernel is not setup to send audio via USB. However konkab did say it looks like the kernel is setup with relevant drivers for a USB audio card. So I assume from this the board can route audio down the USB if it detects an audio card. It's then just how do you route that audio back to the PCM3.1 (IPod emulator again which konkab has and could of the chip is not write protected lift the code off)
08-11-2021, 06:29 PM
#904
Thanks for the reference to konkab’s post #880! I know I read it, but there’s been so much to assimilate, being a newbee to this rather massive thread, I had forgotten about it. So it seems from what Konkab did the problem is solved, isn’t it? Just rewire the quad connector, get an analog to USB adapter like he says to run the audio to the USB (iPod) input, and select the iPod input rather than Aux on the PCM. Am I still missing something?
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will_atl (08-12-2021)
08-12-2021, 10:18 AM
#905
Konkab - about your Quadlock rewiring diagram in Post #880 for the iSudar board, I like it! Now I understand that the audio signals from the CarPlay module exit the PCM chassis on one of the wiring harnesses, rather than along a ribbon cable to the motherboard as I was originally thinking was the case.
When my iSudar board comes (in about 2 weeks), I'm going to rewire my iSudar-supplied Quadlock interrconnecting harness along the same lines but a little differently from what you did. Instead of creating a separate analog jack from the CarPlay module's red/white/black wires and then running a separate cable to the USB port, I'm going to disconnect those 3 wires from the module's female Quadlock (like you do) and connect them instead to the male end that connects to the Factory Quadlock. That will send the analog signals to the AUX port that sits next to the USB port in your photo (as in my car). That way, all I'll need to do to couple the AUX output of the module to the iPod USB input of the PCM is connect the USB port in the glove box through a USB adapter and a male-to-male mini-jack adapter directly to the AUX port in the glove box. No need to run any wires through the car, and it's a super-clean installation. Yes, I'd lose the Aux connection as an analog input from the glove box to the PCM and won't be able to do an analog-digital comparo, but that doesn't matter (given your tests) and I've never, ever used it anyway. And then, of course, to hear CarPlay I'll just select the iPod input rather than AUX on the PCM.
When my iSudar board comes (in about 2 weeks), I'm going to rewire my iSudar-supplied Quadlock interrconnecting harness along the same lines but a little differently from what you did. Instead of creating a separate analog jack from the CarPlay module's red/white/black wires and then running a separate cable to the USB port, I'm going to disconnect those 3 wires from the module's female Quadlock (like you do) and connect them instead to the male end that connects to the Factory Quadlock. That will send the analog signals to the AUX port that sits next to the USB port in your photo (as in my car). That way, all I'll need to do to couple the AUX output of the module to the iPod USB input of the PCM is connect the USB port in the glove box through a USB adapter and a male-to-male mini-jack adapter directly to the AUX port in the glove box. No need to run any wires through the car, and it's a super-clean installation. Yes, I'd lose the Aux connection as an analog input from the glove box to the PCM and won't be able to do an analog-digital comparo, but that doesn't matter (given your tests) and I've never, ever used it anyway. And then, of course, to hear CarPlay I'll just select the iPod input rather than AUX on the PCM.
Last edited by LSR; 08-12-2021 at 10:25 AM.
08-12-2021, 10:30 AM
#906
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I asked seller to send the firmware before I order the unit to “make sure” they provide software support. I couldn’t find direct manufacturer yet.
I have already unpacked the firmware and can confirm frame rate is limited to 30 fps for both CP and AA, but it can be easily modded.
Another workaround for audio input issue is to use external Android box with CP / AA support that connects to usb of our units. CarPlay inside of CarPlay. The Android box is capable of handling two bluetooth connections at a time. One for incoming data (your phone) and another for outgoing (audio streaming to pcm). But that’s a quite dirty workaround.
I have already unpacked the firmware and can confirm frame rate is limited to 30 fps for both CP and AA, but it can be easily modded.
Another workaround for audio input issue is to use external Android box with CP / AA support that connects to usb of our units. CarPlay inside of CarPlay. The Android box is capable of handling two bluetooth connections at a time. One for incoming data (your phone) and another for outgoing (audio streaming to pcm). But that’s a quite dirty workaround.
Is it possible to speak with you by phone? Want to install CarPlay from AliExpress (ISUDAR) and have some questions.
And what you think about this model:
https://a.aliexpress.com/_AZt11e
08-12-2021, 10:39 AM
#907
Konkab - about your Quadlock rewiring diagram in Post #880 for the iSudar board, I like it! Now I understand that the audio signals from the CarPlay module exit the PCM chassis on one of the wiring harnesses, rather than along a ribbon cable to the motherboard as I was originally thinking was the case.
When my iSudar board comes (in about 2 weeks), I'm going to rewire my iSudar-supplied Quadlock interrconnecting harness along the same lines but a little differently from what you did. Instead of creating a separate analog jack from the CarPlay module's red/white/black wires and then running a separate cable to the USB port, I'm going to disconnect those 3 wires from the module's female Quadlock (like you do) and connect them instead to the male end that connects to the Factory Quadlock. That will send the analog signals to the AUX port that sits next to the USB port in your photo (as in my car). That way, all I'll need to do to couple the AUX output of the module to the iPod USB input of the PCM is connect the USB port in the glove box through a USB adapter and a male-to-male mini-jack adapter directly to the AUX port in the glove box. No need to run any wires through the car, and it's a super-clean installation. Yes, I'd lose the Aux connection as an analog input from the glove box to the PCM and won't be able to do an analog-digital comparo, but that doesn't matter (given your tests) and I've never, ever used it anyway. And then, of course, to hear CarPlay I'll just select the iPod input rather than AUX on the PCM.
When my iSudar board comes (in about 2 weeks), I'm going to rewire my iSudar-supplied Quadlock interrconnecting harness along the same lines but a little differently from what you did. Instead of creating a separate analog jack from the CarPlay module's red/white/black wires and then running a separate cable to the USB port, I'm going to disconnect those 3 wires from the module's female Quadlock (like you do) and connect them instead to the male end that connects to the Factory Quadlock. That will send the analog signals to the AUX port that sits next to the USB port in your photo (as in my car). That way, all I'll need to do to couple the AUX output of the module to the iPod USB input of the PCM is connect the USB port in the glove box through a USB adapter and a male-to-male mini-jack adapter directly to the AUX port in the glove box. No need to run any wires through the car, and it's a super-clean installation. Yes, I'd lose the Aux connection as an analog input from the glove box to the PCM and won't be able to do an analog-digital comparo, but that doesn't matter (given your tests) and I've never, ever used it anyway. And then, of course, to hear CarPlay I'll just select the iPod input rather than AUX on the PCM.
08-12-2021, 02:23 PM
#908
Konkab - about your Quadlock rewiring diagram in Post #880 for the iSudar board, I like it! Now I understand that the audio signals from the CarPlay module exit the PCM chassis on one of the wiring harnesses, rather than along a ribbon cable to the motherboard as I was originally thinking was the case.
When my iSudar board comes (in about 2 weeks), I'm going to rewire my iSudar-supplied Quadlock interrconnecting harness along the same lines but a little differently from what you did. Instead of creating a separate analog jack from the CarPlay module's red/white/black wires and then running a separate cable to the USB port, I'm going to disconnect those 3 wires from the module's female Quadlock (like you do) and connect them instead to the male end that connects to the Factory Quadlock. That will send the analog signals to the AUX port that sits next to the USB port in your photo (as in my car). That way, all I'll need to do to couple the AUX output of the module to the iPod USB input of the PCM is connect the USB port in the glove box through a USB adapter and a male-to-male mini-jack adapter directly to the AUX port in the glove box. No need to run any wires through the car, and it's a super-clean installation. Yes, I'd lose the Aux connection as an analog input from the glove box to the PCM and won't be able to do an analog-digital comparo, but that doesn't matter (given your tests) and I've never, ever used it anyway. And then, of course, to hear CarPlay I'll just select the iPod input rather than AUX on the PCM.
When my iSudar board comes (in about 2 weeks), I'm going to rewire my iSudar-supplied Quadlock interrconnecting harness along the same lines but a little differently from what you did. Instead of creating a separate analog jack from the CarPlay module's red/white/black wires and then running a separate cable to the USB port, I'm going to disconnect those 3 wires from the module's female Quadlock (like you do) and connect them instead to the male end that connects to the Factory Quadlock. That will send the analog signals to the AUX port that sits next to the USB port in your photo (as in my car). That way, all I'll need to do to couple the AUX output of the module to the iPod USB input of the PCM is connect the USB port in the glove box through a USB adapter and a male-to-male mini-jack adapter directly to the AUX port in the glove box. No need to run any wires through the car, and it's a super-clean installation. Yes, I'd lose the Aux connection as an analog input from the glove box to the PCM and won't be able to do an analog-digital comparo, but that doesn't matter (given your tests) and I've never, ever used it anyway. And then, of course, to hear CarPlay I'll just select the iPod input rather than AUX on the PCM.
08-12-2021, 02:31 PM
#909
Hi. I’am also from Russia, Moscow.
Is it possible to speak with you by phone? Want to install CarPlay from AliExpress (ISUDAR) and have some questions.
And what you think about this model:
https://a.aliexpress.com/_AZt11e
Is it possible to speak with you by phone? Want to install CarPlay from AliExpress (ISUDAR) and have some questions.
And what you think about this model:
https://a.aliexpress.com/_AZt11e
08-12-2021, 03:34 PM
#910
Konkab - about your Quadlock rewiring diagram in Post #880 for the iSudar board, I like it! Now I understand that the audio signals from the CarPlay module exit the PCM chassis on one of the wiring harnesses, rather than along a ribbon cable to the motherboard as I was originally thinking was the case.
When my iSudar board comes (in about 2 weeks), I'm going to rewire my iSudar-supplied Quadlock interrconnecting harness along the same lines but a little differently from what you did. Instead of creating a separate analog jack from the CarPlay module's red/white/black wires and then running a separate cable to the USB port, I'm going to disconnect those 3 wires from the module's female Quadlock (like you do) and connect them instead to the male end that connects to the Factory Quadlock. That will send the analog signals to the AUX port that sits next to the USB port in your photo (as in my car). That way, all I'll need to do to couple the AUX output of the module to the iPod USB input of the PCM is connect the USB port in the glove box through a USB adapter and a male-to-male mini-jack adapter directly to the AUX port in the glove box. No need to run any wires through the car, and it's a super-clean installation. Yes, I'd lose the Aux connection as an analog input from the glove box to the PCM and won't be able to do an analog-digital comparo, but that doesn't matter (given your tests) and I've never, ever used it anyway. And then, of course, to hear CarPlay I'll just select the iPod input rather than AUX on the PCM.
When my iSudar board comes (in about 2 weeks), I'm going to rewire my iSudar-supplied Quadlock interrconnecting harness along the same lines but a little differently from what you did. Instead of creating a separate analog jack from the CarPlay module's red/white/black wires and then running a separate cable to the USB port, I'm going to disconnect those 3 wires from the module's female Quadlock (like you do) and connect them instead to the male end that connects to the Factory Quadlock. That will send the analog signals to the AUX port that sits next to the USB port in your photo (as in my car). That way, all I'll need to do to couple the AUX output of the module to the iPod USB input of the PCM is connect the USB port in the glove box through a USB adapter and a male-to-male mini-jack adapter directly to the AUX port in the glove box. No need to run any wires through the car, and it's a super-clean installation. Yes, I'd lose the Aux connection as an analog input from the glove box to the PCM and won't be able to do an analog-digital comparo, but that doesn't matter (given your tests) and I've never, ever used it anyway. And then, of course, to hear CarPlay I'll just select the iPod input rather than AUX on the PCM.
08-12-2021, 11:19 PM
#911
Thanks. I have done the wiring part this evening and fitted everything back together. Purchased a cheap usb to aux from amazon but it doesn't work on the PCM3.1 really not wanting to splash out £50 plus delivery to UK. Any chance you can suggest any other cheaper alternatives.
I did manage to get a few pictures of the wiring before I hacked it all up as per your wiring diagram new, all works now via aux port and aux cable direct from board.
I did manage to get a few pictures of the wiring before I hacked it all up as per your wiring diagram new, all works now via aux port and aux cable direct from board.
Last edited by LSR; 08-12-2021 at 11:20 PM.
08-13-2021, 02:01 AM
#912
For those how are going to use AUX to USB adapter, my recommendations would be:
- Set EQ to flat Custom instead of flat Standard. For some reason they sound differently, and Custom sounds more accurately.
- Don't make the volume higher than 32, otherwise you will get distortion.
08-13-2021, 01:45 PM
#913
Yes, I'll lose the factory aux input connection. But that doesn't matter to me, and more importantly I won't have to run any AUX wires through the car to the USB input. That's important for me because my install is going into a 911 and the Aux and USB ports in my car are in the glove box, not in the center console like in the Cayenne and Macan. The area behind and above the 911's glove box, although next to and literally 2 inches away from the PCM, is notoriously difficult to access. When I have the PCM out, maybe I'll see an easy way to run a short wire over to the glove box. But even if I do, the USB and Aux ports are mounted to the glove box and therefore move with the glove box (unlike in the Porsche SUVs, where these ports are located fixed to a non-movable surface). So I'd need to come up with a way to mount the extra Aux wire to or near the inside of the glove box without causing the wire to flop around in the glove box (risk of pulling it), without having it bind when the glove box is closed (risk of damaging it), and without having to drill a hole into the glove box (which I would prefer not doing). I'll probably decide how to proceed once I get the PCM out.
Last edited by LSR; 08-13-2021 at 01:46 PM.
08-13-2021, 04:12 PM
#914
That's great!
There's an adapter from Isudar, which should do the same, but they told me it won't work with PCM 3.1. But I think it should.
https://www.aliexpress.com/item/1005002822676770.html
There's an adapter from Isudar, which should do the same, but they told me it won't work with PCM 3.1. But I think it should.
https://www.aliexpress.com/item/1005002822676770.html
08-13-2021, 04:16 PM
#915
Purchased same interface as you from a UK based seller £47 delivered. I did think about trying the one from AliExpress but its a painful return process if it does not work. I hope the audio is as good as you say it is.
Just to add after some research I have found that if you search for USB to AUX NTG5 you will probably find a local seller selling something similar. From what I have read it is basically a USB storage emulator.
Just to add after some research I have found that if you search for USB to AUX NTG5 you will probably find a local seller selling something similar. From what I have read it is basically a USB storage emulator.
Last edited by LSR; 08-13-2021 at 04:18 PM.