Triangle Wave LFOs

seancostello · Post by **seancostello** » Mon Nov 13, 2006 12:41 pm

Hi:

Is there a simple way of generating triangle wave LFOs for delay modulation in the FV-1?

Thanks,

Sean Costello

pharaohamps · Post by **pharaohamps** » Mon Nov 13, 2006 4:50 pm

Sean, I'm pretty sure you can use the ramp LFO's for that. Look at the source for OEM6, the flanger program in the example project. I'm no assembler whiz but it looks like you can mangle the ramp to get a triangle.

http://www.spinsemi.com/get_spn.php?spn ... um=SPN1001

Unzip it and look at OEM6.spn.

Matt Farrow

frank · Post by **frank** » Mon Nov 13, 2006 5:10 pm

Matt is correct, if you look at the code the part that makes the ramp a triangle is:

cho rdal,rmp0 ;should range 0 to 0.5, a ramp
sof 1,-0.25 ;subtract 1/4 from the 0 to 1/2 result
absa ;make absolute; now 0 to 0.25

seancostello · Post by **seancostello** » Mon Nov 13, 2006 8:09 pm

Thanks! So, it looks like you could use the ramp LFOs to have 2 triangle LFOs. I will be able to use these.

Sean Costello