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vihreä
Joined: Mar 26, 2015 Posts: 5 Location: finland
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vihreä
Joined: Mar 26, 2015 Posts: 5 Location: finland
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Posted: Thu Mar 26, 2015 10:26 pm Post subject:
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the chip is this:
http://www.pselectronic.cz/pdf/1120/1120874.pdf
The manual says it has
On-chip crystal oscillator: 3.58MHz
Does it mean it can't be pitch bent?
Could i somehow limit the voltage to effect as a pitch bend?
Thanks for any help!
EDIT: And there is two pitch buttons on the synth, other lowers and other makes it higher, I just want to control it with potentiometer. Transpose buttons i mean. |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5599 Location: Moon Base
Audio files: 705
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vihreä
Joined: Mar 26, 2015 Posts: 5 Location: finland
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PHOBoS
Joined: Jan 14, 2010 Posts: 5599 Location: Moon Base
Audio files: 705
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Posted: Fri Mar 27, 2015 6:50 pm Post subject:
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yes that is the correct part. as for other bends with it I can't really tell yet.
Maybe you could use one as an oscillator at an audio frequency and mix it with the output of the keyboard.
If that output signal is a squarewave, which is could be, than you could mix it using the XOR gate of one of those chips.
This will give you a somewhat metallic (ringmod) sound. Or you could use the output of the keyboard to control the frequency of it.
It depends a bit on how much experience you have with electronics. _________________ "My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube |
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vihreä
Joined: Mar 26, 2015 Posts: 5 Location: finland
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Posted: Sat Mar 28, 2015 12:35 am Post subject:
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im a rookie on electronics. but i learn fast.
so if I want to make the pitch bend and try some other bends too I should get more than one of those chips?
do you know how to install it to make the pitch mod? i have few potentiometers already, do i need some other parts too? im looking to mod the synth for very cheap.
thanks for all the help |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5599 Location: Moon Base
Audio files: 705
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Posted: Tue Mar 31, 2015 8:30 am Post subject:
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I'd focus on the pitchbend first but get at least 2 chips in case you fry one in the process
You also need a small capacitor, not sure of the value yet would have to calculate that, but probably something in the pF range.
And maybe a resistor or two to make the control a bit nicer but it's not necesarry. Then you'll need something to mount
the chip on like a piece of perfboard and I would advice you to use a socket for it.
do you know how to read circuit diagrams ? _________________ "My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube |
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vihreä
Joined: Mar 26, 2015 Posts: 5 Location: finland
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Posted: Tue Mar 31, 2015 8:34 am Post subject:
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yea i think i already broke the synth. so i guess i dont need help anymore. it just flashes the digit screen and turns off couple of times it stayed on but no sound came out. |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5599 Location: Moon Base
Audio files: 705
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