xhttps://soundpaint.com/pages/soundpaint-one-sound-resound
Create a musical track only using a Cats Purr 
- Requires signing up to mailing list and downloading software( A bit of a process) Youtube video explaining how basically required watching if you want to do it.
Entry Deadline: September 28, 2025
https://www.youtube.com/watch?v=VCGHimVlBPw&t=1s
Lotās of competitions this month. Iām still trying to score the Disney Brave and Ray light competitions. but this looks fun as well.
Anyhow donāt blame me if you annoy your respective partners spending too much time on theseā¦ā¦
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Interesting. I love these ultra-restrictive competitions as you kinda have to get weird with it.
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Itās a little frustrating that theyāve already resampled the purr into a variety of instruments, that was the bit I was looking forward to. Took me a while to realise that as well, I just thought I didnāt know how to use Soundpaint (also true). Anyone else thinking of doing this should watch the first video on that page (linked above)ā¦ save yourself some pain.
The original purr does exist in various pitches at Eb5 - G#5 (on their keyboard, MIDI notes 75 - 80). In the video he does use third-party software but Iām not sure whether youāre allowed to resample it out and use third-party plugins yourself or are limited to just his samples and what Soundpaint can do - the rules arenāt too clear.
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I hear you, just using there software made this a lot more a challenge than it had to be. Would have preferred to use the DAW stock software that would have been a lot more fun. Still might just sample my Catās purr anyway and make something out of it. He has a better tone anyway! 
āHe has a better tone anyway!ā 
I was a bit late to the party with it. If I had more time (the procrastinator cried) I might have given it a proper go. I did have fun making some warbly reeses from running two pure cat tones stretched and detuned. But, thatās kinda my go-to for playing with a new tool, can I reese it and how satisfying is the result.