Mixers circuits ( 13 ) :

• 6 Input Mixer - 3 line inputs and 3 mic inputs   
• Advanced Mixer Design - good article on large audio mixer design, read also   
• An Automatic Microphone Mixer - This application note describes an audio-signal activated microphone mixer designed to accommodate eight input channels.   
• DACS (distributed audio control system) - description of the design of a digitally controlled distributed mixing system   
• High Quality Sound Mixer - very ambitious and expected to be very expensive mixer project, modular design   
• Microphone Mixer - designed for three dynamic microphones   
• Rane MP 24 Mixer Service Manual - This service manual includes the the device circuit diagrams.   
• Simple audio mixer for two signal sources   
• Single capacitor powers audio mixer - micropower and low-voltage op amps allow you to build high-performance analog-signal processors that require no batteries or wall transformers, this simple mixer is powered using one large capacitor such as a Supercap or Dynacap for some time   
• Stage and Recording Mixer - full featured modular mixer design   
• Stereo Mixer - can mix four separate audio inputs to one mono or stereo output signal   

Mixer circuit parts

• A Two-Channel Noise Gate   
• An Unbalanced Mute Circuit For Audio Mixing Channels - application note in pdf format   

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