The Make Noise Morphagene loads 32-bit float, 48 kHz, stereo WAV files. That format is specific enough that most free sample packs online don’t ship in it, and dedicated Morphagene content is rarer than drum kits or synth presets. If you want a steady supply of material, you’ll probably end up making your own reels from raw audio rather than relying on ready-to-load files.
Both approaches are worth pursuing. Pre-made reels get you something new in seconds if you can find content that fits. Converting raw audio takes a few minutes per reel but opens up a much larger pool of sources.
Pre-made reels
Make Noise has published example reels alongside firmware releases. The Make Noise product page is the right place to look [TO VERIFY current download availability]. These files are in the correct format, which also makes them useful for verifying a new microSD card setup before you invest time prepping your own material.
The Make Noise community Discord has threads where users post reels. Find the current server invite on the Make Noise website [TO VERIFY]. Files span field recordings, synthesizer drone, and prepared sound design. Quality varies; some are formatted correctly and some aren’t, even when labeled Morphagene-ready. Check the sample rate and bit depth before loading anything you didn’t prep yourself.
r/modular posts reel links periodically, usually attached to sound design discussions or module demos. Volume is low but the community knows the format requirements, so what gets shared tends to work.
Bandcamp and Itch.io have a small number of artists releasing Morphagene-specific packs, sometimes at name-your-own-price [TO VERIFY via a search on each platform]. Search “Morphagene reels” on both. Some listings are finished reels ready to load; others are raw audio you’d still need to convert.
Making your own
Pre-made reels are sparse enough that most Morphagene users make their own. Personal source material also tends to fit the module better: the Morphagene is a texture and transformation instrument, and material you’ve curated has a coherence that a generic pack rarely matches.
The module rewards long, evolving audio. A 90-second field recording of industrial machinery gives you more splice points worth placing, more textural range for the gene-size knob, and more interesting behavior under vari-speed than a two-second percussion hit. The Morphagene is built for material with slow internal movement. That makes it different from something like the Intellijel Multigrain, which works with shorter samples organized into per-project banks for texture synthesis. For the Morphagene, the longer the source the better, up to the 174-second reel limit.
What to look for: gradual timbral shifts, sustained resonance, room ambience. Field recordings of architectural spaces, decaying metal, water, weather. Long instrument sustains. Industrial machinery. FM radio captures, off-air recordings with interference and signal fade, have a long history in tape music and make unusual reel material. Ambient or drone tracks with slow internal movement work well too.
Freesound.org has millions of clips. Filter by duration (30 seconds minimum for anything useful as a reel), format (WAV), and sort by rating or downloads to surface better material. Most files arrive at 44.1 or 48 kHz; 48 kHz files need only a bit-depth conversion to 32-bit float before they’re reel-ready.
The BBC Sound Effects archive at sound-effects.bbcrewind.co.uk is a professional library free for non-commercial use. Files come as 48 kHz WAV at consistent recording quality, so you only need the bit-depth step. It’s more predictable than community archives, which matters for reels you’ll rely on in performance.
The Internet Archive at archive.org holds thousands of pre-1950 recordings: 78 RPM discs, cylinder recordings, early radio. The surface noise and bandwidth limitations of old recordings aren’t drawbacks here; they add a character that pristine audio doesn’t have. Download FLAC or WAV rather than MP3. Lossy compression artifacts become audible at the fine timescale granular engines operate at.
Free Music Archive at freemusicarchive.org has complete tracks under Creative Commons terms. A CC0 or CC BY ambient or drone piece is legitimate source material. Check the license on each before you invest time preparing it.
These sources are covered in more depth in Free sample sites for hardware producers, which goes through what each archive offers and how licensing works.
The conversion step
The gap between interesting audio and a working reel is one step: convert to 32-bit float, 48 kHz, stereo WAV. In any DAW that supports 32-bit float export (Logic, Reaper, Ableton, Audition), set the bit depth to 32-bit float, the sample rate to 48 kHz, and confirm the output is stereo. If your source is mono, duplicate it to both channels rather than leaving audio on one side only.
Name the file in the mg1.wav through mgw.wav sequence and copy it to the root of a FAT32 microSD card. The module doesn’t look in subfolders.
Splice markers are stored as standard WAV cue points. Add them manually in your DAW before export, or skip them for a reel you’ll play as a continuous loop. If you add them, place them at performance moments: timbral shifts, pauses, changes in density.
If you’d rather skip the manual conversion, SampleStack converts any source format to 32-bit float, 48 kHz stereo, applies the mg naming sequence, and writes splice markers in the chunk format the module expects. It also validates each file before export, flagging anything that would fail to load before it touches the card.
The Morphagene prep guide has the full step-by-step process, including why the format requirements are what they are and what happens when they’re off.