Composers Desktop Project Forum

It's an interesting question that I have been asking myself while redesigning FScape. Eventually my conclusion was that one can distinguish types of processes

- those that require random access or repeated access to some input data
- those that can use a linear input stream but require stream information such as total input length
- those that can use a linear input stream blindly (typical of DSP processes that otherwise run in real-time)
- and the same for the output ports

So, yes, in the general case the assumption would have to be that input and output must be fully buffered. That's how I implemented the PoC right now.

Thanks p8rpp, CDPR7Documentation-MAC/doc/html/cgromodf.htm is actually the index I was looking for!

This is some first simple attempt (process with 1-in-1-out)

    val sr    = 44100.0
    val lenIn = sr * 10
    val ln    = Line(0, 1, length = lenIn)
    val freq  = ln.linexp(0, 1, 200, 4000)
    val sig   = SinOsc(freq/sr).take(lenIn) * 0.5
    val rvs   = cdp.Modify.Radical.Reverse(sig)   // inject CDP here
    val fOut  = file("/data") / "audio_work" / "reverse.aif"
    val aOut  = AudioFileOut(file = fOut, spec = AudioFileSpec(sampleRate = sr, numChannels = 1), in = rvs)
    aOut.last.poll(0, "frames-written")

Hi there,

I'm looking at ways of embedding the CDP programs in an existing system (FScape 2) where they would appear as sort of UGens.
I'm trying to figure out if there is a way to avoid having to write and read temporary audio files for I/O, for example by "piping" the audio input file into the process
and the audio output file from the process. This should work at least on Linux.

Something like this

./modify speed 2 special_in_pipe special_out_pipe 12

I'm pretty optimistic there is some way to get this working in Linux with the existing unmodified shell commands.

For example, I tried to use a named pipe (via mkfifo) as input and write to it from another process, but cdp terminates with

ERROR: INVALID DATA
ERROR: File /data/audio_work/my_pipe.aif either has unredable header, or is a textfile with a CDP reserved extension.

(I double checked that the contents written to the pipe is actually a valid AIFF file).

But then perhaps my idea can't work because certain process will need random access instead of serial stream?

Best, .h.h.

dear p8rpp,

no - i double checked that the output file is fresh and doesn't exist yet.

(btw, apologies for posting in "announce", didn't realise)

Ok, getting there

./modify speed 2 '/data/projects/CdpChapter/background/CDPWorkshop1/Worksheets1-5/WS1/CSRCWS01SF01capm.wav' /data/audio_work/foo.aif 12

So SD -- works with phase vocoder files, TD -- works with regular (time domain) files.

Thanks. Still it doesn't really explain the details of the process. If I just throw some parameters at it using my intuition:

$ ./pitch transp 4 '/data/projects/CdpChapter/background/CDPWorkshop1/Worksheets1-5/WS1/CSRCWS01SF01capm.wav' /data/audio_work/foo.aif 0 12
Application doesn't work with this type of infile.

I have no clue why my input is not good. It's a monophonic sound file from the workshop directory...

N.B. AIFF output files seem fine.

Hi there,

is there any documentation on the cdp shell programs? For example, when I browse through the 'Composers Desktop Project: Tutorial Workshop 1', it's not apparent to me which shell programs are actually invoked. Example:

A. MODIFY SPEED - simple pitch transposition, using semitones
   (SS: Soundfiles > Pitch >Transpose/Speed > semitones)
   (SL: PITCH: SPEED > pitch > tape transpose by semitones)

My guess is this is the `pitch` program, but which mode?

    altharms    octmove    transp    tune    pick    chordf    chord

I.e. where would I find the reference documentation for the pitch program?

Thanks!

Best, .h.h.

Sorry, I forgot to mention how the file was created:

    ./reverb /data/audio_work/test.wav /data/audio_work/out.wav 1 0 10 0.5 0 5

Hi,

I'm getting libsndfile errors playing back a generated file with SuperCollider. It looks like this:

File '/data/audio_work/out.wav' could not be opened: Error in WAV file. No 'data' chunk marker.

I can open the file in my own software and rewrite it into a "clean" file, and then it works.

More info:

$ sndfile-info /data/audio_work/out.wav
Error : Not able to open input file /data/audio_work/out.wav.
File : /data/audio_work/out.wav
Length : 2872680
RIFF : 2872672
WAVE
fmt  : 16
  Format        : 0x1 => WAVE_FORMAT_PCM
  Channels      : 2
  Sample Rate   : 48000
  Block Align   : 4
  Bit Width     : 16
  Bytes/sec     : 192000
PEAK : 24
  version    : 1
  time stamp : 1489253433
    Ch   Position       Value
     0   50682          0.518669
     1   30869          0.501828
cue  : 28
  Count : 1
   Cue ID : 1718183539  Pos :     0  Chunk : data  Chk Start : 0  Blk Start : 0  Offset :     0
LIST : 2016
  adtl
  *** note : 2004 (too big)
Have 0 marker at position 2148 (0x864).

Error in WAV file. No 'data' chunk marker.

Here's another attempt giving output file extension 'ana' (which I've seen in another thread --- should it really matter?)

$ ./pvoc anal 1 /data/audio_work/reverb-L.wav /data/audio_work/reverb-L.ana
ERROR: INVALID DATA
ERROR: Cannot open output file /data/audio_work/reverb-L.ana


*** Error in `./pvoc': double free or corruption (!prev): 0x0000558ebd823010 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x70bcb)[0x7f724299abcb]
/lib/x86_64-linux-gnu/libc.so.6(+0x76f96)[0x7f72429a0f96]
/lib/x86_64-linux-gnu/libc.so.6(+0x7778e)[0x7f72429a178e]
/lib/x86_64-linux-gnu/libc.so.6(fclose+0x132)[0x7f7242990c12]
./pvoc(+0x3f8e9)[0x558ebb8c08e9]
./pvoc(+0x408f6)[0x558ebb8c18f6]
/lib/x86_64-linux-gnu/libc.so.6(+0x35920)[0x7f724295f920]
/lib/x86_64-linux-gnu/libc.so.6(+0x3597a)[0x7f724295f97a]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf8)[0x7f724294a2b8]
./pvoc(+0x1b9a)[0x558ebb882b9a]
======= Memory map: ========
558ebb881000-558ebb8d9000 r-xp 00000000 08:12 10881663                   /home/hhrutz/Documents/devel/ComposersDesktopProject/dev/Release/pvoc
558ebbad8000-558ebbad9000 r--p 00057000 08:12 10881663                   /home/hhrutz/Documents/devel/ComposersDesktopProject/dev/Release/pvoc
558ebbad9000-558ebbada000 rw-p 00058000 08:12 10881663                   /home/hhrutz/Documents/devel/ComposersDesktopProject/dev/Release/pvoc
558ebbada000-558ebbade000 rw-p 00000000 00:00 0
558ebd811000-558ebd832000 rw-p 00000000 00:00 0                          [heap]
7f723c000000-7f723c021000 rw-p 00000000 00:00 0
7f723c021000-7f7240000000 ---p 00000000 00:00 0
7f7242713000-7f7242729000 r-xp 00000000 08:12 8650842                    /lib/x86_64-linux-gnu/libgcc_s.so.1
7f7242729000-7f7242928000 ---p 00016000 08:12 8650842                    /lib/x86_64-linux-gnu/libgcc_s.so.1
7f7242928000-7f7242929000 r--p 00015000 08:12 8650842                    /lib/x86_64-linux-gnu/libgcc_s.so.1
7f7242929000-7f724292a000 rw-p 00016000 08:12 8650842                    /lib/x86_64-linux-gnu/libgcc_s.so.1
7f724292a000-7f7242abf000 r-xp 00000000 08:12 8651797                    /lib/x86_64-linux-gnu/libc-2.24.so
7f7242abf000-7f7242cbe000 ---p 00195000 08:12 8651797                    /lib/x86_64-linux-gnu/libc-2.24.so
7f7242cbe000-7f7242cc2000 r--p 00194000 08:12 8651797                    /lib/x86_64-linux-gnu/libc-2.24.so
7f7242cc2000-7f7242cc4000 rw-p 00198000 08:12 8651797                    /lib/x86_64-linux-gnu/libc-2.24.so
7f7242cc4000-7f7242cc8000 rw-p 00000000 00:00 0
7f7242cc8000-7f7242dcb000 r-xp 00000000 08:12 8651804                    /lib/x86_64-linux-gnu/libm-2.24.so
7f7242dcb000-7f7242fca000 ---p 00103000 08:12 8651804                    /lib/x86_64-linux-gnu/libm-2.24.so
7f7242fca000-7f7242fcb000 r--p 00102000 08:12 8651804                    /lib/x86_64-linux-gnu/libm-2.24.so
7f7242fcb000-7f7242fcc000 rw-p 00103000 08:12 8651804                    /lib/x86_64-linux-gnu/libm-2.24.so
7f7242fcc000-7f7242fef000 r-xp 00000000 08:12 8650833                    /lib/x86_64-linux-gnu/ld-2.24.so
7f72431cb000-7f72431cd000 rw-p 00000000 00:00 0
7f72431eb000-7f72431ef000 rw-p 00000000 00:00 0
7f72431ef000-7f72431f0000 r--p 00023000 08:12 8650833                    /lib/x86_64-linux-gnu/ld-2.24.so
7f72431f0000-7f72431f1000 rw-p 00024000 08:12 8650833                    /lib/x86_64-linux-gnu/ld-2.24.so
7f72431f1000-7f72431f2000 rw-p 00000000 00:00 0
7ffcde4a2000-7ffcde4c3000 rw-p 00000000 00:00 0                          [stack]
7ffcde517000-7ffcde519000 r--p 00000000 00:00 0                          [vvar]
7ffcde519000-7ffcde51b000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]
Aborted

hi there,

what am I doing wrong here:

$ ./pvoc anal 1 /data/audio_work/reverb-L.wav /data/audio_work/reverb-L.pvoc
ERROR: INVALID DATA
ERROR: Cannot open output file /data/audio_work/reverb-L.pvoc


Input is a 11 seconds monophonic file. Platform is Linux.

Thanks!

best regards, hanns holger