The questions everyone asks first.
Pricing, formats, accuracy, privacy. If something here isn't covered, the contact page goes straight to a human.
01What file formats do you support for input?
What file formats do you support for input?
PCM WAV (mono or stereo, any sample rate and bit depth). Other formats like MP3, FLAC or AIFF are not supported — convert them to WAV first.
02What export formats are available?
What export formats are available?
WAV with SMPL loop chunks (works on most hardware samplers that read the SMPL convention), SFZ (text-based, works with most free and commercial SFZ hosts), SF2 (SoundFont 2.01 binary), KMP/KSF (Korg arranger multisample), HLI/HLD (non-destructive project files).
03What is a .hli project file?
What is a .hli project file?
A .hli file stores your WAV samples, detected pitches, loop points, crossfade settings, normalize flag and ADSR preview values in a binary non-destructive project file. Samples are preserved intact — you can reload, toggle normalize off, swap loop preset and re-export forever, without paying for pitch detection again.
04How many samples can I upload at once?
How many samples can I upload at once?
Up to 61 WAV files per batch. Nothing is actually uploaded — the files are decoded in your browser. Files can be any length; a 2-minute take is fine. Only the first 10 seconds of each file are used for pitch detection, keeping it fast. The rest of the audio stays available in the editor.
01Do credits expire?
Do credits expire?
No. Credits never expire. Buy once, use whenever you need them.
01How accurate is the pitch detection?
How accurate is the pitch detection?
An ensemble of four algorithms — three classical analysers and a neural model — is fused into one decision per sample. Detection is typically within a few cents on tonal material (piano, guitar, brass, strings). The detected MIDI note is mapped to the nearest semitone, cents-deviation is preserved in metadata, and you can override the assigned note per sample before export.
02What are the loop algorithms?
What are the loop algorithms?
Five next-generation algorithms for multisamples and three dedicated ones for drum slices, each engineered in-house with a unique combination of parameters. They cover different kinds of material — from a fast first pass to specialised finders for sustained tones, harmonic content and tremolo-style textures. Each one has its own crossfade curve and can be re-run on any selected region.
01Can I use my MIDI controller?
Can I use my MIDI controller?
Yes. Connect any USB MIDI controller to preview samples, navigate notes and audition loops in real time. Works in Chrome and Edge.
01Is my data secure?
Is my data secure?
Your WAV files never reach our disks. Pitch detection runs in your browser — audio is decoded and analysed locally on your CPU. For the in-house loop finder, the browser streams raw PCM for one note at a time to a Germany-based server (GDPR-compliant), which finds the loop in memory (≤10 s) and returns coordinates only. Nothing is written to disk. Decoded audio is cached in your browser until you clear it; .hli / .hld project files are saved locally.