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via
this auction"Custom LED Mod: We have replaced the green Group B and the red Sawtooth and Chorus II LEDs with blue ones; this makes for a great custom look, and gives better visual indication of what is presently active than panels with all red or all blue LEDs.
Audio Input Mod: We have added an audio input circuit, to allow the gorgeous Juno chorus effect to process external audio. But instead of drilling holes in this piece of vintage gear, we have done it in a way that is 100% non-destructive and reversible. The Patch Shift jack has been disabled, and has been instead used for the audio input. (The Patch Shift function is probably not used by most players; it is a simple process to reverse this mod if desired. The jack has not been re-labeled, to keep everything original.)
Plugging an audio signal into this jack routes it through the high-pass filter, the VCA Level, and the stereo chorus, and it sounds fabulous! Note that the audio does not route through the low-pass filter, so you cannot do resonant filter things. Unlike some synth mods, you do not need to press a key to use the audio input - simply send the signal in, and it is present at the Juno's outputs. You can play the keyboard along with the external audio if you like."
via this auction
Audio Input Mod: We have added an audio input circuit, to allow the gorgeous Juno chorus effect to process external audio. But instead of drilling holes in this piece of vintage gear, we have done it in a way that is 100% non-destructive and reversible. The Patch Shift jack has been disabled, and has been instead used for the audio input. (The Patch Shift function is probably not used by most players; it is a simple process to reverse this mod if desired. The jack has not been re-labeled, to keep everything original.) 
Plugging an audio signal into this jack routes it through the high-pass filter, the VCA Level, and the stereo chorus, and it sounds fabulous! Note that the audio does not route through the low-pass filter, so you cannot do resonant filter things. Unlike some synth mods, you do not need to press a key to use the audio input - simply send the signal in, and it is present at the Juno's outputs. You can play the keyboard along with the external audio if you like."
via this auction
Beats or tempos are as follows:
