[sdiy] slightly OT: Danelectro Hash Browns FLanger & crappy sound

[anthony]

I think I'll just stick to building my own stuff.

> In order to do a BBD 'right' you need sophisticated filtering before
> and after the chip, as well as companding etc...

Maybe a little compression/limiting at the input but I prefer to use an 
LM1894 Dynamic Noise Reduction chip - of which I have a few. They work a lot 
like an NE570 compandor except that it's a VCF instead of a VCA. The 
response time is a LOT faster so you don't get ' pumping' at fast time 
constants. It's single ended too which means you don't have to do anything 
to the signal before the BBD. But since the chip is stereo with a single 
control path, you can put one channel on the input and one on the output. 
And you can connect the control path to the input or the output depending on 
what your doing (pre or post). The regular filters can be pretty lax. Also 
the filter can be pretty lax if your clock is running between say 200kHz and 
2MHz.

I've read a lot about 'through-zero' flanging too. Really all you need is 2 
flangers run parallel. Along with a phaser is pretty cool too.

ramble on...