Apple Logic Pro 9 - Manual (Page 264)

Setting Channel Strip Input Format
The channel strip input format determines the mono, stereo, or surround status of the
channel strip. Note that software instrument and external MIDI channel strips do not have
a format button.
Mono Stereo Left Right Surround
• Mono: One circle represents a mono input format. The level meter shows a single
column.
• Stereo: Two, interlocked circles represent a stereo input format. The level meter divides
into two independent columns when a stereo input format is chosen.
• Left: Two circles, with the left one filled, indicate a left channel input format. When this
input format is chosen, the channel strip only plays the left channel of an audio file.
• Right: Two circles, with the right one filled, indicate a right channel input format. When
this input format is chosen, the channel strip only plays the right channel of an audio
file.
• Surround: Five circles indicate the surround channel input format. The level meter
divides into multiple linked columns (the number matches the project surround format)
when the surround input format is chosen.
Your chosen input format for a channel strip impacts the following two areas:
• The plug-ins shown on the channel strip will be available as:
• Mono-to-mono or mono-to-stereo versions on mono channel strips
• Stereo-to-stereo versions on stereo channel strips
• Surround or multi-mono versions on surround channel strips
• The Pan control determines the position of the channel signal in the stereo field:
• On mono channel strips (this includes left and right input format channels), the Pan
control determines the left/right position of the signal.
• On stereo channel strips, the Pan control determines the balance between the left
and right channel signals.
Note: To access the Surround Panner, you must first set the channel strip output format
to Surround, via the channel strip’s Output slot.
264 Chapter 10 Working with Instruments and Effects