A desktop app for syncing music to the Snowsky Echo / Echo Mini (or any USB music player). Handles FLAC block-size encoding, album art resizing, filename formatting, and genre-based playlists — all in one place.
Source library is never modified. All processing and writes happen on the target device only.
Source library — scan your music folder, check what to sync, double-click to preview
Target browser — view device files, manage genre playlists
Profiles — save different sync setups with their own formatting and processing options
Library scanner
- Scans your source folder and displays everything in a file tree
- Shows file size, format, duration, block size (FLAC), and art dimensions for all formats
- Check/uncheck individual files or whole folders to include in a sync
- Scan progress updates as it goes
Note on large libraries: Scanning can and will freeze the UI while it reads metadata. Just wait it out — it will finish.
Preview player
- Double-click any song in the source library to open a mini player
- Shows album art, song title, and artist
- Seek bar, play/pause, and volume control
- Volume starts low and is remembered between sessions
Device browser
- Browse the device folder the same way as the source
- Files already synced show a checkmark next to the name
- Right-click any file (or a multi-selection) to delete from the device
Syncing
- Copies checked files from source to target
- FLAC files are re-encoded with the correct block size (optional, can disable per profile)
- Album art is resized for all supported formats: FLAC, MP3, M4A, OGG
- Keeps a sync state so already-synced files are tracked automatically
Why block size? Some posts on the Snowsky forums reported "Format Not Supported" errors for FLAC files with large block sizes. I haven't run into this myself, but adding a block-size limit seemed like a reasonable precaution.
Why resize album art? A few reports mentioned larger art not rendering at all on the device. It's also a small screen, so you don't need a 1500×1500 image. Resizing helps with that and probably doesn't hurt performance either.
Filename formatting
- Customize the output filename with tokens
- Supported tokens:
{title},{artist},{album},{track},{disc},{year},{genre},{folder},{filename},{format} {folder}mirrors your source folder structure on the device
Profiles
- Save multiple sync setups as named profiles
- Each profile stores filename format, art size, and block size settings
Genre playlists The Snowsky Echo doesn't support playlists natively, but it reads genre tags. This feature lets you use genre tags on device files as playlists — an idea originally posted by the community here.
- All genres on your device files appear in a list
- Files with no genre show up under (No Genre) so nothing gets lost
- Build a playlist by double-clicking songs in the device tree, or right-click to add multiple at once
- Apply writes the genre tag to all selected files
- Append mode adds to existing tags; replace mode clears and sets new
- Rename a genre to merge it with another (useful when the same thing got tagged two different ways)
- Remove a genre from all its files at once
- Double-click a song in the builder to remove it
Option 1 — Manual
Requires Python 3.11+.
pip install -r requirements.txt
python src/main.py
Option 2 — Batch file
Run calliope.bat. It sets up a virtual environment in the project folder, installs dependencies into it, and launches the app. Nothing gets installed outside the project directory.
Calliope was developed with AI assistance — specifically Claude. I planned what it should do, made decisions along the way, and did the testing. The AI wrote most of the code.
That felt worth mentioning.
- reign
