Stemify Player
The desktop counterpart to the phone app: your Plex library and its stems, with per-stem faders, mute/solo, mix presets and a master volume. It is dressed as Microsoft Excel 2016.
stemify-player # or "Stemify Player" in the app grid (scripts/install-desktop.sh)
First run
Data → Connect to Plex (or click Sign in on the title bar), then enter the 4-character
code at plex.tv/link. It picks the music library at …/Flacs. Until then the workbook is built
from the stem server's index alone (artist / album / song from the stems folders), so every
separated song is already playable.
Where things are
| Excel | Here |
|---|---|
| Sheets: Songs, Artists, Albums, Playlists, Stems, Queue | The library. Double-click (or Enter) plays a song from that point, or opens an artist, album or playlist as a new sheet. Backspace / middle-click closes it |
| Row 1 filter buttons, Sort & Filter | Sort by any column |
| "Tell me what you want to do" | Search (Ctrl+F). Results open as a sheet |
| Status bar Average / Count / Sum | Select a range of times and it adds them up |
| Zoom slider | Master volume (scroll on it, too). Ctrl+scroll on the grid is the real zoom |
| Home → Cell Styles | Mix presets: Full Mix, Karaoke ("Bad"), A Cappella ("Good"), No Drums, Rhythm, No Guitar, No Bass |
| Home → Cells | Play Next, Add to Queue, Delete Rows (queue or playlist) |
| Insert → Playlists | New Plex playlist from the selection, or add the selection to one |
| AutoSum | AutoShuffle: shuffle the whole sheet |
| Quick Access Toolbar | Play/Pause, Undo = previous song, Redo = next song |
| Format Mix task pane | Now playing, a sparkline of the song to seek on, and the stems as a column chart: drag a column to set its level, double-click for 0 dB, M / S below |
| Green triangle in a cell | The song that's playing |
#GETTING_DATA |
A playlist loading from Plex |
| File → Info / Account / Options | Library and server status, Plex sign-in, server addresses and folders |
Keys: Space play/pause, Ctrl+←/→ previous/next, V vocals on/off, arrows/Shift+arrows select, Ctrl+C copies cells as text, Ctrl+Q quits. The media keys, the desktop's media controls and KDE Connect on the phone work through MPRIS.
How it plays
- Stems come straight off the
Stemsshare (/var/mnt/unraid/Music/Stems) when it's mounted, else they're downloaded from stemserve once into~/.cache/stemify/player/files(4 GB, oldest first out). Songs without stems play the original from the music share, or from Plex if the share isn't there. - A decoder thread reads every stem about 1.5 s ahead of the playhead, so songs start at once and nothing is decoded whole; the audio callback mixes with click-free gain ramps. The fader taper matches the phone (0.8 = 0 dB, top = +3.9 dB).
- Plays are reported to Plex (now playing, and the play count at 90%).
- Album art: Plex's, or the album folder's
cover.*, or the picture embedded in the file. - The queue, position, mix and volume come back on the next launch (
~/.config/stemify/).
Checking it without a window
QT_QPA_PLATFORM=offscreen stemify-player --no-mpris --screenshot /tmp/p.png@5 --quit-after 6
--eval 'JS@seconds' runs JavaScript against the window (e.g. library.activate(0, 0)@2).