Squidfanny - Circuit Bent YAMAHA PSS-460

Classic FM Synthesizer with added Phazer, LFO, Pitch Modulation, Weird Oscillation and Loads of strange FM Glitch & New sounds.

Hacked Chorus reveals a nice clean LFO which can be used to drive the Pitch, and an oscillating PHAZER....

Preset CHORD / BASS sound can be totally transformed with the aid of Glitch Buttons on the right panel. Switches scramble the FM circuits and allow new sounds and instrument patches to be generated.

The PSS-460 (PSS-470) is the best of all the yamaha FM Keyboards, with Pure FM Drums, Digital Synthesizer, Chord/Bass and fake Stereo Effect accomplished with internal analog chorus circuits....

Category:

Music

Tags:

• squidfanny
• circuit
• bent
• yamaha
• pss-460
• pss-470
• omnichord
• om-27
• zoom-o-tron
• FM
• glitch
• lo-fi
• digital
• synthesizer
• kaoss
• pad

[circuitben]

Ok, I have everything hooked up bar the phazer, I found another resistor to replace to alter the depth of the LFO on the symphonic sound though, on the other side of the 8 legged chip. Do you mean you are feeding in a home-made osc to get phazing?

[squidfanny]

@circuitben From what I remember it was just just a case of feeding the outgoing audio signal from one of the op-amps back into the first pre-amp after the FM chip (through a pot & cap). Basically just poke around and listen out for some loud screech, and adjust the pot until it sounds right. It's the same process as making a feedback oscillator (VL-1, PSS-9, etc) except in this case you wanna feed the signal into the chorus circuits (before the main amp circuits).

Hope that helps :)

[circuitben]

Is this using the Ltc1799? I've got one in my shed, waiting for some love.



[squidfanny]

@circuitben Hi Feller, yep it's an LTC. You can just about get enough freq. from a 4093 or a 555, although you won't be able to get much pitch-up. Pipe the new clock straight into the corner pin of the big FM chip.

LFO comes from hacked chorus, just need to replace a resistor on the analog board and wire in a couple of extra LEDs for vactrol. Phazer was just a feedback oscillator into the chorus circuits, through a small cap.

Hey, say Hi to Trippy for me if you see him :)

[chickenarm3000]

I went to the thrift store one day last year and found both the 460 and 470 sitting there. I had to get them both! I haven't bent them yet, but plan too! But I thought the sounds that come out of these sounded great! I like what you did with them. I hope I don't screw mine up. I never bent anything yet! I gonna practice on smaller cheap ones first.

[1787dude]

is this a hard bend????? are there directions anywhere?

[owlbeemoth]

masterfulllll



[circuitben]

@squidfanny Sweet, I'll have a dig around as soon as I get a spare day. :)

I'll be in that Liverpool soon enough, consider the greetings passed on.

Thanks for the response, I've been messing with the chorus on the pss-450, sounds like it does similar stuff, although not as effectively. More like Daft Punk style.

[Jemgirldotcom]

That's so good! The bending done has created some great new sounds & makes the accompaniments just so much better :)

[flux302]

nice .... Love it