Jakob Laue wrote:
Okay,
finally I found some time to try some stuff out. First, I gave Olivers
examples a try.
I made a patch with eight [ol_sfplay~] objects to simulate my sample
player and tested this patch on my old Raspi 2
and also a Raspi 3. I also tested two different audio interfaces: a
Scarlett 2i4 USB audio interface and a HDMI-to-CINCH-Converter running
on the 2835 ALSA driver.
The best result was achieved by the Raspberry Pi 3 with the Scarlett
audio interface. I used
- block length of 64 from Pd's preferences
- buffersize of 512 and 1024 for [ol_sfplay~]
I have no pops and Pd does not freeze.
When I use the same configurations with the hdmi-to-cinch-converter and
alsa, I get audio pops.
please also consider using even 2048 as buffersize for [ol_sfplay~]. AND
you might want to increase PD's audio delay with the "-audiobuf" startup
flag.
try "-audiobuf 120" or higher and work your way down from there.
i remember using this method on a PI2 with an 8 track wav-file and
really had to increase those values to get a smooth playback.
it worked alright in the end but then i had no video-traffic ...
in general, use a PI3 if possible
best
oliver
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