[linux-audio-user] Re:How can I time-stretch the sound like this (with SND & CLM)

[Paul]

Thanks for reply.
I wanted to try by myself and I made last night a
quick hack for extreme time stretching by using FFTs.
I like the results very much.
Here are some demos (the links will work only for few
days):
Original sound is this:
http://zeus.integrasoft.ro/~nop/1stretch_paul_in1.ogg
Stretched (over 60x) is this:
http://zeus.integrasoft.ro/~nop/1stretch_paul_out1.ogg

Please tell me your opinion about the stretched sound.


The program is not complete (is just a quick hack
written in about one hour), but if you are interested,
I can put it somewhere on net (and make it usable and
improve the quality :) ). 

Paul


>>Hi.
>>I found out a very interesting page and a webcast
>>about the 9'th symphony of Beethoven stretched to 24
>>hours here:
>>http://www.park.nl/park_cms/public/index.php?thisarticle=118
>>And on this page ( http://www.notam02.no/9/tech.htm
)
>>I found that for this was used CLM and SND.
>>How can I do the same?

>Its just a simple granulate processing with a tiny
bit
>of reverb on top.
>Halfly pseudo, it can look like this:

>(let* ((read0 (make-readin filename #:channel 0))
>        (read1 (make-readin filename #:channel 1))
>        (gr0 (make-granulate #:expansion 22.0
#:length >0.15 #:hop 0.03))
>        (gr1 (make-granulate #:expansion 22.0
#:length >0.15 #:hop 0.03)))
>   (do-X-number-of-times
>    (output-to-file file-object (granulate gr0
(lambda >() (readin read0)))
>                                (granulate gr1
(lambda >() (readin read1))))))


>Very simple. You have to tune the length and hop
sizes >though, plus volume 
>and stuff.
>http://ccrma.stanford.edu/software/snd/snd/clm.html#granulate



>> It's possible to do this in
>> batch mode?

>Yes, the first first version of this stretch was
>actually run in batch 
>I didn't want to stay up all night generating all the
>files. :-)

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com