A quoi sert l'audio IN ?

Citation : Connecting various sources to the audio inputs
Let's try connecting various types of audio device (radio, or MD or CD player) or tone
generator to the audio input jacks. Sound that contains no drums is most effective.
Try out various types of sounds or music. Depending on the content, you may discover
unexpectedly interesting results.
1. Connect an audio device etc. to the audio inputs of the ER-1mkII. Each jack is monaural,
so you may need to use a stereo-mono adapter plug,
depending on the device you are connecting.
2. Adjust the output level of the connected device so that
the peak LED lights only at the maximum levels. At this
time you can turn on the AUDIO IN THRU key (the
key will light) to hear the input sound without having
to press the part key.
3. Select the pattern or song whose volume you wish to
adjust, and press the Play/Pause key to begin playback.
4. Press the Mode key to enter Global mode.
5. Use the cursor [
][] keys to set the parameter select
LED to INPUT GAIN 1.
6. Rotate the dial to adjust the input volume to create a
balance with the volume of the other parts.
Adjust INPUT GAIN 2 in the same way.
The input sound will be heard while you press the AUDIO IN key. The Audio In parts
that are recorded in a pattern or song do not produce the sound that was being input
when the parts were being recorded; they simply allow the sound that is received in the
audio input at that moment to be heard from when the trigger is turned on, for the
duration set by the DECAY knob.
Decay Decay Decay
Sound input from Audio In
Trigger On Trigger On Trigger On
Time
Sound heard from Audio In (line output)
Trigger On Trigger On Trigger On
Time
If you wish to strike AUDIO IN keys 1 or 2 to hear the sound, you must turn off the
AUDIO IN THRU key (the key will be dark).
The audio inputs are for line-level input. Microphones, guitars, or turntables etc. cannot
be connected directly.
If the input gain setting is excessive, the sound may be distorted.