Atari 400

A udio Noise Filters:
VOL
~------------------~
1
c;;wnr:~~.·~~·~
Low Frequency
Noise
cut off set
counter.
Any channel noise output (without high pass filter)
VOL
Channel
- by N
Frequency
~------------------------------------------------- Frequency
Channel 1 output (with high pass filter)
Channel 2 output (with high pass filter)
Clock
D
II. 24