I've been looking at various circuits for doing the attack and release envelope follower for a side chain. My first stab was sort of a current pump architecture, in that it would pump up or down using constant current sources. Saw something like that in a THAT app note. I was using an LM13700, which makes the circuit much simpler. Anyway, the operation didn't seem right to me. The pump action was linear. That is, the rising or falling slopes were constant and independent of signal amplitude.
So I thought maybe an RC type circuit would be more musical. The slopes would be exponential and independent of amplitude. A 5ms attack would be just that. I made a quick circuit to test an odd approach to this, came up with this response:
Not tweaked, but you get the idea. Set for pretty fast release. Playing music through this, seems to me to respond awfully fast, a lot of "pumping" action. Not sure if this is good or not.
Has anyone tried both approaches? Wondering which is more musical and transparent.
jh
So I thought maybe an RC type circuit would be more musical. The slopes would be exponential and independent of amplitude. A 5ms attack would be just that. I made a quick circuit to test an odd approach to this, came up with this response:
Not tweaked, but you get the idea. Set for pretty fast release. Playing music through this, seems to me to respond awfully fast, a lot of "pumping" action. Not sure if this is good or not.
Has anyone tried both approaches? Wondering which is more musical and transparent.
jh