Mono and stereo signal

The information on this page supplements the official manuals.

Mono or stereo?

Effects sound gloriously in stereo. However, when it comes to FOH sound, stereo separation may not translate very well to a live audience, because people seldom are in the right spot to hear both sides equally well. Discussion

Setting output to stereo

To get sound in stereo:

• the preset must contain at least one stereo effect, and
• the signal is not summed to mono before entering the output section, and
• the device must be set up for stereo output in the I/O menu, and
• the connected amplification system, headphones etc. is stereo.

Setting output to mono

To get mono sound:

• sum the signal on the grid to mono

OR

• set Output Mode in the I/O menu to one of the mono settings: "Sum L+R" or "Copy L>R"

"Sum L+R" means that the left and right signal are mixed together. Be aware that this may cause phase cancellation.

"Copy L>R" means that the left side signal is copied to the right side (the original right signal is gone). This will defeat effects such as Ping-Pong delay, which is is based on hard-panned signals.

Read this: Connections and levels.

Note that outputs 1 and 2 can be configured differently.

Effect blocks and mono/stereo output

Flanger, Chorus and Phaser are set to mono by default. Use the parameter LFO Phase to switch the effect to stereo.

Everything before an Amp block or Drive block will be summed to mono. To keep a stereo signal before the Amp block stereo, use two Amp blocks (Axe-Fx II only), use Input Select and Balance to make each block handle one side of the signal.

When placing a Cab block at the end of the grid, the output signal will be summed to mono, unless the Cab is set to Stereo mode or when using two mono Cab blocks in parallel. When a Cab block is set to Stereo mode but followed by a mono effect such as Drive, the resulting signal is also summed to mono.

Stereo Enhancer

Read this: Enhancer block.