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previous: Mike I pulled out some effects I've buil... -- 1/5/2000 12:47 AM

Re: Whisper Compressor

1/5/2000 6:41 AM
AMZ	Re: Whisper Compressor >>Whisper Compressor: It seems to compress in waves. Not smooth at all. The notes increase volume in waves. There are 2 possible problems. (1) Your clm6000 is defective. There are LOTS of them floating around that are sub-standard. (2) The detector section is only half-wave rectified so you are getting breathing caused by fluctuations in the dc control voltage. It should be more noticeable on low frequency notes. When designing this device, I actually had a detector section that used a bias network that greatly reduced the breathing effects but got out-voted in which version to use, for several reasons, not the least of which was reducing parts count. Even with the detector on the schematic, when using a good clm6000 the problem should not be very noticeable. I might suggest adding a series resistor then a capacitor to ground on the output of the detector opamp. Starting values 1k/1uF, and increase capacitance to 2.2uF if more smoothing is desired. The Q&D Compressor 1 is a much smoother device. regards, Jack

1/5/2000 6:41 AM

AMZ

Re: Whisper Compressor

>>Whisper Compressor: It seems to compress in waves. Not smooth at all. The notes increase volume in waves.

There are 2 possible problems. (1) Your clm6000 is defective. There are LOTS of them floating around that are sub-standard. (2) The detector section is only half-wave rectified so you are getting breathing caused by fluctuations in the dc control voltage. It should be more noticeable on low frequency notes.

When designing this device, I actually had a detector section that used a bias network that greatly reduced the breathing effects but got out-voted in which version to use, for several reasons, not the least of which was reducing parts count.

Even with the detector on the schematic, when using a good clm6000 the problem should not be very noticeable. I might suggest adding a series resistor then a capacitor to ground on the output of the detector opamp. Starting values 1k/1uF, and increase capacitance to 2.2uF if more smoothing is desired.

The Q&D Compressor 1 is a much smoother device.

regards, Jack

Replies:

Mike Is there a way to check the CLM6000... -- 1/7/2000 1:32 AM