Script treatments

[rc0]

Hello,

I’m trying to apply the same treatment to the output files that AS gives me. For ex.:

orig_sound -> treatment -> sound-out_1
then
sound-out_1 -> treatment -> sound-out_2
then, again
sound-out_2 -> treatment -> sound-out_3
and again
sound-out_3 -> treatment -> sound-out_4
and so on…

With batch processing I was able to apply the same treatment to multiple files, but not to the output files.
I’m using the AS console but I can’t figure out how implement recursion since I’m not a programmer (just learning AS).
Of course, one can do this by hand but the idea is to find a script to optimize the process.

Any hint, advise or command line will be appreciated!

Thanks in advance
RC

[roebel]

Hello

unfortunately I don’t quite understand what you want to do. You should be able to store all results of the first the batch processing into a folder and then run the batch on that output folder. If you want all the recursions to happen automatically with a parameter controlling the recursion depth, then you have to use the supervp command line interface n a terminal. For this you first have to activate the command line tools by means of clicking on the installer (Install Commandline Tools) in AudioSculpt 3.28.app/Kernels and then you can write shel scripts or python scripts that execute the command for you.

Best
Axel

[rc0]

Hello Axel,

Thank you for your answer!

I’ll try to explain it again. For ex.: my original soundfile is a C4. I transpose it a minor 3rd up. The output is a Eb4. Then, I transpose the new soundfile (Eb4) a minor 3rd up, so it gives me a Gb4. Again, I repeat the procedure with the new file (Gb4 or F#4) a minor third up to obtain a A4, and so on…

Today Mr. Liuni kindly explained me the way to run supervp from the terminal, and it works great! the only problem that I’m facing is that for every process I have to write a new command line. I know that it’s possible to write a script with few command lines and variables (in this case the input/output file names) that recall itself until the termination condition is met, but I haven’t been able to achieve it. The only way I get something similar is in OM, with supervp inside a omloop, but what I’m looking for is to make it with a script.

Best regards,
RC

[roebel]

Hello RC

as I had mentioned already in my previous post, you can write shell scripts, python scripts, perl scripts, ruby scripts, tcl scripts or whatever scripting language you like to do this for you. These scripting languages are sort of programming languages and they are a bit too complex to explain here in a Forum post. A second question is what sort of end condition you want to use? If for example you want just a fixed number of recursions the script is simple, but if you want other conditions as for example iterate over 1h20min or iterate until the next birthday of the british queen, (or until the sound becomes perfect) or anything else that may come to mind you would need to invest time into learning how to represent the desired condition in the scripting language of your choice.

To start I would think shell scripting should be fine and you can learn the basics for example here

https://developer.apple.com/library/mac/documentation/opensource/conceptual/shellscripting/shell_scripts/shell_scripts.html

or here
http://www.codecoffee.com/tipsforlinux/articles2/043.html

I give you a short example iterating the same transformation (a time stretch) for a given number of times here, please read the web sites above to understand and learn how to use these constructs

#! /bin/bash  

if [ $# != 3 ] ; then  
    echo "usage: $0 #iterations infile outfile"  
    exit   
fi  

cnt=$1  
infile="$2"  
outfile="$3"  
tmpfile="$outfile.tmp"  
cp "$infile" "$outfile"  
ii=0  
while [ "$ii" -lt "$cnt" ]; do  
    ii=$[$ii+1]  
    cp "$outfile" "$tmpfile"   
    echo run $ii of $cnt  
    supervp -A -Z -S "$tmpfile" -D2 -M2000 -Np1 -P1 "$outfile"  
done  

echo done.  

You can see how the files are copied to achieve the possibility to iterate the given command. You should be able to adapt this easily to your command line.
Please note that you need to set the executable permissions of the script for this to run. Then you can for example run it like this

./iterate_command.sh 4 ./infile.aiff ./outfile.aiff

Best
Axel

[rc0]

Hello Axel,

Thank you very much for the information and useful example. The links are very helpful to start with shell scripting!
I figure out to make a loop with while-do (full of comments since I’m still not familiar with the language):

  
#!/bin/bash  

# This script searches for the first .aif file in the script folder,   
# copy and renames it with the script file name  
# it is mandatory to have an .aif file in the same folder.  

# -----  E D I T  P A R A M E T E R S ---------  

# max recursions  
recx=4  

# trans  
transx=0  

# transke  
transkex=300  

# time stretch (1=orig)  
stretch=2  

# normalize (0=default)  
normx=0  

# ------ E D I T   E N D  --------------------  

# get the name of the script for the new soundfiles  
namex="$(basename "$0" .sh)"  

# input starts from 0  
infilex=0  
# output starts from 1  
outfilex=1  

# path of current script  
folderx="$(dirname "$0")"  

# first .aif file in folder  
sourcex="$(find "$folderx" -maxdepth 1 -name '*.aif' | head -1)"  

# copy orig soundfile and renames it  
cp "$sourcex" ""$folderx"/"$namex"_0.aif"  

# loop while do  
while [ $infilex -le $recx ]; do  

# S U P E R V P   C O M M A N D  
supervp -t -Z  -S"$folderx"/"$namex"_"$infilex".aif -Afft 70 -N4096 -M4000  -Wblackman  -trans "$transx" -transke "$transkex" -D"$stretch" -P1 -norm "$normx" "$folderx"/"$namex"_"$outfilex".aif  

# add 1 to in & out filenames  
infilex=$(expr $infilex + 1)  
outfilex=$(expr $outfilex + 1)  

done  

Not the best/elegant/optimal way but it works as a temporal solution. I’ll try to improve it, especially in the termination condition

Best regards,
RC

[roebel]

Hello RC

wow for a few days of shell scripting experience this script is quite impressive. I am sure you will discover many interesting things you can do with this approach.

If, at some point, you feel too limited with what you can do in the shell don’t forget that shell scripting is the least powerful scripting language and others are available that have support for very complex operations allowing even for scientific computing. Personally I very often integrate supervp (and other command line tools) with python to build complex analysis/transformation/synthesis systems.

Best
Axel

[bresson]

Hello RC, if you are familiar with OpenMusic, the OM-SuperVP library can be another interesting way to easily script such recursive process.
Best,
Jean

[rc0]

Hello Jean,

Thanks for the advise! Yes, OM-SuperVP was the starting point but, because of external reasons, I’m not allowed to use OM in this project. So I search for a loop solution with a script. Attached a screenshot of a primitive attempt.

Best regards,
RC