[PD] [writesf~] sample rate problem?

[Roman Haefeli]

hello tim

there is no '-rate' flag for [writesf~], since it doesn't do any
sampling rate conversion. it just uses the sampling rate of pd. it
wouldn't make much sense to upsample for recording (e.g. 44100 ->
96000Hz) anyway.

in other words: you need to run pd at the desired samplerate. if you
want to record with 96000Hz, run pd with '-r 96000'.  BUT this still
doesn't always guarantee, that pd will effectively run with the desired
sampling rate. sometimes it is needed to set the clock of the audio card
to the desired rate by the preferences menu of the soundcard (sometimes
the application just changes the samplingrate setting of the card on the
fly). 
for example on my system, when i want to record at 96kHz, i need to set
my hdsp-card to 96kHz, so that jackd runs at 96kHz, so that pd runs at
96kHz, so that i can record in pd with 96kHz. got it?

if that doesn't help you already, please tell us, on what os you work
and which soundcard/driver you use. 

roman
 

On Sun, 2007-07-01 at 17:42 -0400, Tim Flood wrote:
> Hello Everyone-
> 
> I have written a simple patch (see below) designed for hard disk recording 
> at 24-bit/96kHz.  The -bytes flag sets the bit depth correctly, but no 
> matter what value I use to set the -rate flag, the file is always created 
> with a sampling rate of 44.1kHz.  (My soundcard is set up to work at 96kHz). 
>   Is this a bug, or am I just missing something?  Any help would be greatly 
> appreciated!
> 
> Best Regards,
> 
> -Tim
> 
> #N canvas 224 44 449 382 10;
> #X msg 129 286 start;
> #X msg 198 286 stop;
> #X obj 43 336 writesf~ 2;
> #X obj 153 71 time;
> #X obj 16 173 pack s s s s s s;
> #X obj 16 96 makefilename %u;
> #X obj 26 147 makefilename %u;
> #X obj 153 96 makefilename %u;
> #X obj 161 122 makefilename %u;
> #X obj 169 147 makefilename %u;
> #X obj 16 71 date;
> #X obj 21 122 makefilename %u;
> #X obj 43 260 inlet~;
> #X obj 100 260 inlet~;
> #X obj 129 336 print record;
> #X text 123 173 time & date stamp;
> #X text 10 4 [diskRecorder~];
> #X text 13 18 writes an audio file to disk.;
> #X text 43 244 main-l;
> #X text 101 244 main-r;
> #X obj 16 50 bng 15 250 50 0 empty empty empty 0 -6 0 10 -262144 -1
> -1;
> #X text 231 223 open 24-bit/96kHz file;
> #X msg 16 224 open -rate 96000 -bytes 3 -aiff \$1;
> #X obj 16 198 makesymbol %s-%s-%s_%s-%s-%s;
> #X text 36 48 push me;
> #X connect 0 0 2 0;
> #X connect 0 0 14 0;
> #X connect 1 0 2 0;
> #X connect 1 0 14 0;
> #X connect 3 0 7 0;
> #X connect 3 1 8 0;
> #X connect 3 2 9 0;
> #X connect 4 0 23 0;
> #X connect 5 0 4 0;
> #X connect 6 0 4 2;
> #X connect 7 0 4 3;
> #X connect 8 0 4 4;
> #X connect 9 0 4 5;
> #X connect 10 0 5 0;
> #X connect 10 1 11 0;
> #X connect 10 2 6 0;
> #X connect 11 0 4 1;
> #X connect 12 0 2 0;
> #X connect 13 0 2 1;
> #X connect 20 0 3 0;
> #X connect 20 0 10 0;
> #X connect 22 0 2 0;
> #X connect 23 0 22 0;
> #X connect 23 0 14 0;
> 
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