Signal Experiments

With the KVR Developer Challenge 2018 at the download and voting stage it's time to focus on each of the 26 entries that are available now, for free, for everyone.

Ambiguous Guitar Duo by Signal Experiments

Using the magic of phase alignment, Signal Experiments tried to answer the curious question of what would happen if you align samples grabbed from different instruments. And with the excellent samples of FlameStudios, FreePats, Patch Arena and bigcat Instruments, they present this one of a kind amalgamation of five different instruments squashed into a bass and a guitar. Well, sort of. Whatever, the outcome is, it is called the Ambiguous Guitar Duo.


  • The library format is SFZ and has been tested (and developed) with Plogue sforzando.
  • The samples themselves are in WAV format.
    • 144MB uncompressed.
    • 44.1kHz 16-bit.
  • There are several SFZ files provided:
    • Guitar and bass with a piano blended in:
      • ambGuitarPiano.sfz.
      • ambBassPiano.sfz.
      • ambBassGuitarPiano.sfz: Combined version for 88-key live-playing with the guitar shifted to higher keys. Key-switching controls whether there is more bass or more guitar.
    • Less weirdness without the piano:
      • ambGuitar.sfz.
      • ambBass.sfz.
      • ambBassGuitar.sfz.
    • Lightweight versions of the above sampled in minor-thirds:
      • xxx_lite.sfz.
  • A MIDI controller with weighted keys or a MIDI-capable digital piano is recommended for live playing. Otherwise, a bit more bravery might be necessary.
  • Licensing: GNU General Public License version 3 or later, with a special exception.

Download, vote & donate at

If you haven't read it already, you should check out the KVRDC16 winner's story: Winning the KVR Developer Challenge: An interview with Julijan Nikolic (Youlean)

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