Hi Greg,
thanks for your explanation.
As far as I know, the only real difference between the Zero and other
PI's with audio out is the missing high/low pass filters and the audio
jack. So my approach was to use the standard Analog.conf and modify it
to use the pwm-2chan overlay:
Code:
--------------------
[COMMON]
CARD="ALSA"
OUTPUT="hw:CARD=ALSA"
ALSA_PARAMS="80:::1"
SSET="PCM"
GENERIC_CARD="ONBOARD"
DTOVERLAY="pwm-2chan"
CONTROL_PAGE="soundcard_control.cgi"
LISTNAME="Analog audio Pi Zero"
PARAMS1="pwm-2chan,pin=18,func=2,pin2=13,func2=4"
SHAIRPORT_OUT="hw:CARD=ALSA"
SHAIRPORT_CONTROL=""
RPI_MODEL="HAT_ALL_NO_HAT"
--------------------
I played a little with the params for dtoverlay but I had no success.
Unfortunately, due to my restricted available time, I am not really in
the mood for hours and hours of investigation and searching for what is
wrong in the setup.
So unless someone knows whats wrong or has a good idea, I am thinking
about buying an already supported DAC.
------------------------------------------------------------------------
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