[sdiy] Final project ideas

[Richard Wentk]

At 11:09 11/04/2006, Aaron Lanterman wrote:

>And am putting together a list of random ideas to get student's brains
>working:
>
>http://users.ece.gatech.edu/~lanterma/ece4803/option1ideas.html
>
>If anyone has any ideas of project ideas they'd like to add, let me 
>know... the main thing is I want it to be something that hasn't been done 
>before, but at the same time use enough existing material that they could 
>finish up by May 5th.

Hmmm - very filter heavy list. Not a bad thing necessarily, but there are a 
few more options:

1. Digital waveshaper: ADC - voltage-controlled lookup table selector - 
DAC. Some interesting gotchas here with quantisation noise and resolution. 
(Would it need post-filtering or not?)

2. Scanner mixer. JH has one of these somewhere on his site. 4 or 8 ins, 
selected by a single CV - a sort of anti-sequencer. Could be switched, or 
could be a smooth fade between inputs. Extra points for programmable fade 
slope.

3. A single vocoder channel. Building an entire vocoder in three weeks 
would be a bit ambitious, but a single analysis/synthesis channel with some 
maths to show how the rest of the channels would be calibrated and a block 
outline schemo for the rest would be doable. Could the analysis and 
synthesis filters be made voltage controlled for extra flexibility?

4. Voltage controlled Baxandall or single channel parametric EQ. VC of both 
frequency and amplitude.

5. Three or four way formant filter. One channel built would probably be 
enough, as long as the theory was there for the rest.

6. A CV processor module that can take any DC or AC coupled input and 
positive or negative scaling. This isn't hard to do. What's harder is to do 
it *accurately* so you could - for example - invert a keyboard CV without 
losing relative pitch accuracy.

Richard