No sound retroflag gpi case with pi zero w 2 (Solved)

[jpwhiting]

@slime1982 Thanks for the fixes. I tried some other cmdline.txt options that were needed previously and various config.txt but this got it working. I ended up removing the other cmdline.txt bits that I tried before from https://retropie.org.uk/forum/topic/26628/audio-issues-after-latest-raspbian-updates-june-2020

I'm still hearing lots of buzzing during game play though. I've got the alsa device set to "default" and the sound device set to headphones have tried various settings in es menu but there always is a loud buzzing. Is it a bad connection to the gpio pins? everything else seems to work well (screen, buttons, etc.)

Thanks, this zero 2 seems to work much better besides the sound issue.

[hyperwolf83]

@jpwhiting

The following are my config.txt setting that worked for me. I got sound, wifi, and syncthing running with no isseues. I used the weekly retroarch pi 3 image dated 31 Oct. I also get correct stereo sound when using headphone port, with no static.

# For more options and information see
# http://www.raspberrypi.org/documentation/configuration/config-txt.md
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi

# Additional overlays and parameters are documented /boot/overlays/README

#config_hdmi_boost=0

# force hdmi while the tv can take time before sending the signal on the hdmi o$
#hdmi_force_hotplug=1

# uncomment for composite PAL
#sdtv_mode=2

# uncomment for lirc-rpi
#dtoverlay=lirc-rpi

# if you plug your tv at the same time as your rpi and that the rpi switches fr$
boot_delay=3

# uncomment if you don't want the rainbow at startup
disable_splash=1

# default CEC name
cec_osd_name=gpicase

# Enable audio (loads snd_bcm2835)
dtparam=audio=on

# Overclock
gpu_mem_256=128
gpu_mem_512=256
gpu_mem_1024=512

avoid_safe_mode=1

kernel=zImage

dtoverlay=audremap,pins_18_19,enable_jack=on
display_rotate=1
dtoverlay=dpi24
overscan_left=0
overscan_right=0
overscan_top=0
overscan_bottom=0
framebuffer_width=320
framebuffer_height=240
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x6016
#hdmi_timings=320 0 28 18 28 480 0 2 2 4 0 0 0 60 0 32000000 6
hdmi_timings=240 1 38 10 20 320 1 20 4 4 0 0 0 60 0 6400000 1
# dtoverlay=pwm-2chan,pin=18,func=2,pin2=19,func2=2
avoid_safe_mode=1
disable_pvt=1
disable_audio_dither=1
# dtoverlay=pwm-audio-pi-zero

[jpwhiting]

@hyperwolf83 Thanks. That seems to work well here. At first I still got the buzzing but I pressed on the back of the gpi case "cartridge" briefly and it went away completely. I probably have a loose connection in there somewhere.

[cnoto]

Just confirming that this worked for me and it is definitely worth updating your GPI projects with the pi zero 2. Much better performance!

[Lo0twig]

At first this works well but after updating the pi via raspiconfig the internal audio error returns.
I tried to use the old config with no luck. Any ideas ?

[Lo0twig]

Ah i guess the solution is to copy the GPI-Case files again to the sd card after updating.

[pumpytums]

@slime1982
Hi,
It was the batteries I have another GPi and Zero 2 same issue even in Recallbox. Tried some rechargeables no problems at all.

Odd though it played games no problem which I would have thought would pull more amps.

So Amazon brand Alkaline batteries even new don't like the current draw.

Thanks for your help

[suprjami]

@pumpytums I've seen a few posts saying decent batteries are needed with the Zero 2W in GPi case.

I have Ikea Ladda 2450 which seem to work.

I have also seen the Panasonic Eneloop Pro are a good choice.

[EG500]

i had a gpi case, and for the life of me was never able to get the thing to work.

There was one point in time, after about a month of research, restarting the process 3 times and following every guide i could find, there was One time i was able to get the controls to work, the sound never worked, and the controls didnt work in any of the emulators.
After restarting, I couldnt get the controls to work in es at all, and recallbox wouldnt even boot up.

Id recommend staying away from the retroflag gpi case (plus the pi zero has always been pretty bad at emulation in general). Id recommend going with the Piboy dmg, it works with a pie 3 or 4, and just works perfectly right out of the box..

[retropieuser555]

@eg500 did you hold down select+left (or start+left) to change the controls? That's what seems to trick a lot of people up with the gpi.

The piboy is pretty much unavailable where I am as far as I can tell, unless I paid a big customs cost to import it.

Whereas retroflag's products do seem to be produced and sold quite widely so that is something to consider when choosing between the two. Extra buttons is pretty nice though

[EG500]

@retropieuser555 yes i did, both ways, it just flat out doesnt work correctly. I was really dissappinted woth it, where as piboy has their own retropie image you just doenload instal and youre done

[mcbdz29]

@hyperwolf83 Any use of having "avoid_safe_mode=1" twice ?

[WhirlyFan]

@Slime1982 bless you. this was so painful trying to get this thing set up.