If you put a MultiSample into a MultichannelPanner and then into a Replicator, then:
• You could set the angle of the MultichannelPanner to depend on ?VoiceNumber (the copy in the Replicator), for example:
?VoiceNumber / ?NumberVoices * 2 - 0.5 (to get the range from -0.5 to 1.5 for the angle).
• You could trigger the MultiSample with a Threshold sound. To get each subsequent threshold crossing to trigger the next voice, you could use:
([ThreshSound] L countTriggersMod: ?NumberVoices) eq: (?VoiceNumber - 1)
• To trigger slightly different snares each time, you could make the Index of the MultiSample also depend on ?VoiceNumber, for example:
?VoiceNumber - 1 / (?NumberVoices - 1)
This should scale with the number of voices (if you increase from quad to more channels). Let us know how it goes!