Thank you for your donation!


Idea: Modded RPi4 Board for better SQ
#1
Hello since i readed much about audio lately i wondered if it would make "sense" to mod a RPi4 board for "ultimate SQ" 

things i came across so far and do "in theory" make sense:

1. replace the DC/DC Converters, one step further would be to provide the different voltages directly but i think thats a step too far, and someone also posting here said good dc/dc converter do make nearly the same effect (maybe add filter capacitors too?)

2. filter capacitors for usb, maybe as a sort of decoupling for all usb devices drawing power?

3. remove the BT/WIFI modul or disable it in some way, since even if disabled in config it still actively transmits

4. replace the clock for a better one 

5. remove the headphone amp circuitry, just because we can, im not sure if its even "active" while not using, but probably most wont use it anyway  

any other ideas/suggestions?
Reply
#2
Rather modify your brain. In our brain there are blockers/filters of signals from our sensors/senses (smell, sight, hearing, touch, ....). You can take safe doses of cannabis, LSD or similar psychedelics. These substances can partially turn off these filters. Then more information comes from the sensors (ears) to the brain. Many of us try to have the best sound system but forget that music only happens in our brains. Ear cleaning will have a much greater effect on music perception than RPI modificationsWink.
Reply
#3
(01-14-2022, 10:02 AM)Pixxel Wrote: Rather modify your brain. In our brain there are blockers/filters of signals from our sensors/senses (smell, sight, hearing, touch, ....). You can take safe doses of cannabis, LSD or similar psychedelics. These substances can partially turn off these filters. Then more information comes from the sensors (ears) to the brain. Many of us try to have the best sound system but forget that music only happens in our brains. Ear cleaning will have a much greater effect on music perception than RPI modificationsWink.

please dont reply if you think it doesnt do something.

beside that. i like to tinker :Smile so let us/me have a little fun Wink
Reply
#4
(01-14-2022, 05:34 AM)Ghoostknight Wrote: Hello since i readed much about audio lately i wondered if it would make "sense" to mod a RPi4 board for "ultimate SQ" 

things i came across so far and do "in theory" make sense:

1. replace the DC/DC Converters, one step further would be to provide the different voltages directly but i think thats a step too far, and someone also posting here said good dc/dc converter do make nearly the same effect (maybe add filter capacitors too?)

2. filter capacitors for usb, maybe as a sort of decoupling for all usb devices drawing power?

3. remove the BT/WIFI modul or disable it in some way, since even if disabled in config it still actively transmits

4. replace the clock for a better one 

5. remove the headphone amp circuitry, just because we can, im not sure if its even "active" while not using, but probably most wont use it anyway  

any other ideas/suggestions?

You might want to investigate the Allo SIG board which attempts to provide a super low-noise, optimized Raspberry Pi for audio.

Allo USBridge SIG
https://allo.com/sparky/usbridge-signature-pcb.html

Experimenting with hardware modifications might be a lot easier on a CM4 I/O board. 

Raspberry Pi Compute Module 4 I/O board
https://www.raspberrypi.com/products/com...-io-board/

ETA: Fun thread on Raspberry Pi noise ;-)
https://www.audiosciencereview.com/forum...isy.19137/

-Tim
Enjoy the Music!
moodeaudio.org | Twitter Feed | Git Repo
Reply
#5
As well, any serious discussion about hardware hacking deserves exposure to the https://diyaudio.com crowd who live for this stuff. There’s tons of information there regarding failed and successful experiments.

Regards,
Kent
Reply
#6
(01-14-2022, 12:40 PM)Tim Curtis Wrote: You might want to investigate the Allo SIG board which attempts to provide a super low-noise, optimized Raspberry Pi for audio.

Allo USBridge SIG
https://allo.com/sparky/usbridge-signature-pcb.html

Experimenting with hardware modifications might be a lot easier on a CM4 I/O board. 

Raspberry Pi Compute Module 4 I/O board
https://www.raspberrypi.com/products/com...-io-board/

ETA: Fun thread on Raspberry Pi noise ;-)
https://www.audiosciencereview.com/forum...isy.19137/

-Tim

1. i know about the allo bridge, tho its a little expensive and im unsure about the old pi3, many say its superior for hats but i will probably keep using usb dacs in the future
on the other side, i just use wlan anyway, so ethernet on the usb bus isnt that much of a problem... (but other usb devices are) i kinda have to think about this (and maybe even try the pi3b once again)

2. actually a great idea with the cm4, i also found out you can even buy the modules without wlan/bt module (and WITH emmc, i was just about to buy the allo emmc for the same price), i will look around if maybe even better i/o boards exists, but the official one looks kinda good

3. i also found the thread, but its mostly "asr blabla" imho but thanks anyway Smile


Quote:As well, any serious discussion about hardware hacking deserves exposure to the https://diyaudio.com crowd who live for this stuff. There’s tons of information there regarding failed and successful experiments.

Regards,
Kent


ah, agreed :Smile will open a thread over there too!
Reply
#7
The CM3+ in the SIG is same as a Pi-3B+ and thus runs moOde and USB audio perfectly and with great performance.
Enjoy the Music!
moodeaudio.org | Twitter Feed | Git Repo
Reply
#8
(01-15-2022, 07:00 AM)Ghoostknight Wrote: ...
2. actually a great idea with the cm4, i also found out you can even buy the modules without wlan/bt module (and WITH emmc, i was just about to buy the allo emmc for the same price), i will look around if maybe even better i/o boards exists, but the official one looks kinda good

Note that the official Raspberry Pi CM4 I/O Board does *not* support both uSD cards and eMMC. You have to make the choice at time of purchase. Flashing the eMMC requires setting/unsetting a jumper on the module, yada yada yada.

Quote:As well, any serious discussion about hardware hacking deserves exposure to the https://diyaudio.com crowd who live for this stuff. There’s tons of information there regarding failed and successful experiments.

Regards,
Kent

Quote:ah, agreed :Smile will open a thread over there too!

Candidly, I was hoping for "instead" rather than "too". After all, the discussion isn't intrinsically about moOde player but all players based on the same hardware and OS. Once the dust has settled the results can be referenced.

Regards,
Kent
Reply


Forum Jump: