MUFF WIGGLER Forum Index
 FAQ & Terms of UseFAQ & Terms Of Use   Wiggler RadioMW Radio   Muff Wiggler TwitterTwitter   Support the site @ PatreonPatreon 
 SearchSearch   RegisterSign up   Log inLog in 
WIGGLING 'LITE' IN GUEST MODE

TM3030 sequential note tuning shift by semitone
MUFF WIGGLER Forum Index -> Oakley Sound Systems  
Author TM3030 sequential note tuning shift by semitone
ark1971
Hi all,
I'm currently testing my TM3030. I have a strange problem. If I have a sequence of notes at the same pitch, every second note is a semitone higher out of tune. The voltage output from the DAC appears fine while I did notice a shifting DC level at the output of the op-amp U7. Has anyone come across this problem before?
thanks,
joe
Synthbuilder
Not heard about this one before. But I wonder whether it's related to the other problem that you were having.

Having a shifting output at pin 7, U7 would suggest a problem with the way the glide circuit is working. Does the problem go away if the notes are played with a gap in between them?

Tony
ark1971
Tony,
Thanks for the reply. Just a few minutes ago I replaced the 4066 to be a MCI4066BCPG and made sure that the 4050 ICs were from the same manufacturer. This has fixed it.,
joe
MUFF WIGGLER Forum Index -> Oakley Sound Systems  
Page 1 of 1
Powered by phpBB © phpBB Group