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Altera_Forum
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16 years ago

Vibrato(FM) effect on DE2

Hi, i'm trying to create effect like vibratto, flanger. Simply frequency modulation. My sampling for audio is 48khz As far as i know it can be done using circular buffer(variable delay to modify phas...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

this post is old, i managed to change noise from this audio to worse noise :)

Standard delay and echo works good. Tremolo(AM) using this wave works good too. Vibratto is a problem, simulation in matlab works good too, but implementing it in hardware is to problematic for me. The noise i hear can be heard on this mp3 : 
http://dark.art.pl/~kvasir/noise.mp3
It is 200hz sinus obtained from PC line out, modulated with 2hz triangle(50:50) with values 0 to 720. I think that what is heard in background IS frequency modulated signal. Any other ideas ?

ps: i use 2-port ram megafunction, with read before write.