[PD] swallow the first bit of audiofile

[oliver]

michael strohmann wrote:
> on rpi / stretch / pd-46 || ESI UJ6 Audiointerface…
> sometimes the first half second of audiofiles (4 channel) gets swallowed
> 
> i am using
> 
> [t b b]
> |	|
> [1(   [open audiofile.wav(
> |     /
> [readsf~ 4]
> 
> my first bet was that the amplifier goes into sleep mode and needs time to wake up. but i can rule that out.
> now i am a bit clueless ….

are you completely sure ? even if you are,  maybe reading & playing an 
arbitrary short soundfile consisting of a 2 hertz sinus at low volume 
every 10 seconds might make sure that the amp REALLY never goes to sleep.

> does anybody else have similar troubles on RPi ???

no, there must be something else blocking the audio engine

you might try a little delay before the "1" message, or even try to run 
the [readsf~] in a subpatch~ with a higher blocksize (see attached patch 
again ;-)

that's all i can think of right now

i figure using [tabplay~] (thus preloading the soundfiles into RAM) is 
not an option ?

best

oliver
-------------- next part --------------
#N canvas 556 237 462 300 10;
#X obj 59 157 readsf~ 2;
#X obj 50 228 dac~;
#X obj 35 186 *~ 0.2;
#X obj 87 185 *~ 0.2;
#X msg 59 132 open ../sound/bell.aiff \, 1;
#X obj 142 174 spigot;
#X obj 142 198 del 1;
#X obj 193 174 tgl 15 0 empty empty loop 17 7 0 10 -262144 -1 -1 0
1;
#X obj 67 29 loadbang;
#X msg 67 54 \; pd dsp 1;
#N canvas 0 50 544 300 readsf_blocksize 0;
#X obj 111 49 inlet;
#X obj 396 137 iem_blocksize~;
#X floatatom 396 164 5 0 0 0 - - -, f 5;
#X obj 111 164 readsf~ 2;
#X obj 88 230 outlet~;
#X obj 147 230 outlet~;
#X obj 255 48 inlet;
#X obj 208 181 spigot;
#X obj 208 205 del 1;
#X obj 111 76 symbol;
#X msg 111 123 open \$1 \, 1;
#X obj 397 204 block~ 1024;
#X connect 0 0 9 0;
#X connect 1 0 2 0;
#X connect 3 0 4 0;
#X connect 3 1 5 0;
#X connect 3 2 7 0;
#X connect 6 0 7 1;
#X connect 7 0 8 0;
#X connect 8 0 9 0;
#X connect 9 0 10 0;
#X connect 10 0 3 0;
#X restore 269 157 pd readsf_blocksize;
#X obj 380 134 tgl 15 0 empty empty loop 17 7 0 10 -262144 -1 -1 0
1;
#X obj 290 227 dac~;
#X obj 275 185 *~ 0.2;
#X obj 327 184 *~ 0.2;
#X msg 269 110 ../sound/bell.aiff;
#X connect 0 0 2 0;
#X connect 0 1 3 0;
#X connect 0 2 5 0;
#X connect 2 0 1 0;
#X connect 3 0 1 1;
#X connect 4 0 0 0;
#X connect 5 0 6 0;
#X connect 6 0 4 0;
#X connect 7 0 5 1;
#X connect 8 0 9 0;
#X connect 10 0 13 0;
#X connect 10 1 14 0;
#X connect 11 0 10 1;
#X connect 13 0 12 0;
#X connect 14 0 12 1;
#X connect 15 0 10 0;