What free programs allow the user to work with specific frequencies, resulting in, i.e., a range of "pseudo-notes" between C and C#? A quick summary of how to use this feature or a link would also be appreciated.

closed as off-topic by Dave, Doktor Mayhem Sep 15 '18 at 18:48

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  • "Questions seeking recommendations for specific equipment are off-topic, because they are primarily opinion based. Instead, describe the required function and setting in which the equipment will be used, and ask what you should look for to achieve that." – Dave, Doktor Mayhem
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  • 2
    What do you mean by "work with specific frequencies"? Music notation programs can let you work with pitch bends or tuning changes, though it'll probably be harder to notate and playback quarter tones. – Dekkadeci Sep 15 '18 at 6:10
  • Lilypond has support for notation of microtones though the MIDI output may not be exactly what you're looking for, as lilypond is more for notation.
  • Scala lets you experiment with scales, tunings, etc. Output is to MIDI (which various devices or software support) or other formats.
  • Pure Data or Supercollider can generate arbitrary frequencies from code.

However the learning curve on these free softwares may not be very gentle, depending.

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