SF2 sampler with recording and chopping
About this app
Record or import breaks and vocals, chop them and export a sound font to make beats using Helio sequencer on your phone or tablet. Can analyze key and tempo, apply highpass and lowpass filters and normalize gain.
Licensed under AGPL-3.0-or-later, by Denys Nykula.
What's New in v1.0.9
Imported from the F-Droid repository index.
- * Clone or delete sample and linked instrument
- * Free memory after sf2 export
- * Play linked sample when changing preset
Version history
Jul 15, 2025 · 6.5 MB · Android API 34–35 · code 10
Imported from the F-Droid repository index.
- * Clone or delete sample and linked instrument
- * Free memory after sf2 export
- * Play linked sample when changing preset
SHA-256 2aeb208f208b02c129549e421c0c08e0e0d1e08844214b9f227425c33fd70abe
Jul 11, 2025 · 6.5 MB · Android API 34–35 · code 9
Imported from the F-Droid repository index.
- * Hide apply filter button after resetting default filter values
- * Rewind after importing sample and show analyzing overlay
- * Sort instrument zones by start when making key range subsequent
- * Preserve end when chopping existing zone
- * Ask specific filename, don't request access to entire directory
- * Don't show analyzing overlay if file selection cancelled
SHA-256 964eaf7c72b3bba3e238ffd9840a19eccab0fbdf5b4e274a07014317d33005db
Will it run on your device?
60%
- Targets newer Android builds, so legacy devices may be excluded.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be org.codeberg.nykula.sapfir is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.0.8 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Sapfir first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Sapfir, and a listing is removed when the evidence for it stops holding up.
Get Sapfir
Every source we list for org.codeberg.nykula.sapfir is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
2aeb208f208b02c129549e421c0c08e0e0d1e08844214b9f227425c33fd70abe
Signing certificate
76b334b601e4920d88e742ebf6a8ab151837bde6602e7e42766b8e2b8e6bfbb4
Permissions Required
What each permission lets Sapfir do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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