PRIVATE / BROWSER-LOCAL AUDIO TOOLS / 01
Edit ID3 tags, remove silence, convert stereo or mono, and inspect codec details—locally in your browser. No signup.
● FILES STAY ON-DEVICE WHEN THE TASK CAN RUN LOCALLY
TASK ATLAS / ONE FILE → THE RIGHT WORKSPACE
01 LOCAL READBrowser memory only02 NO SIGNUPOpen a task immediately03 METHOD SHOWNRules stay visible04 NEW FILE EXPORTOriginal stays untouchedTOOL DIRECTORY / ONE JOB PER WORKSPACE
Each workspace opens with controls, file facts, and an export method for one task.
FLAGSHIP WORKSPACE /id3-tag-editorSee the fields first; decide what to keep, clean, or rewrite.
MP3 / ID3v2.3
192 kbps / 44.1 kHzLOCAL READTITLEField Notes 042
ARTISTMara Ellison
ALBUMNight Transit
YEAR2026
TRACK03 / 12
GENREField Recording
SILENCE REMOVAL /silence-removerSet a threshold, minimum gap, padding, and crossfade. The cut rule stays visible.
CHANNEL MATH /stereo-to-monoChoose the channel rule; keep duration and sample rate visible.
FILE INSPECTION /audio-file-analyzerCODECMP3RATE44.1 kHzCHANNELSStereoDURATION04:28BITS192 kbpsSIZE6.14 MBFacts, not repair claims.
LOUDNESS LAB /lufs-meter
LAB GATE · BS.1770 / GATING / TRUE PEAKKeep the route labeled as a lab until reference fixtures pass.
COMPLETE TOOL MAP / 17 TASKS
Five metadata routes, four silence routes, five channel operations, and three inspection or loudness routes. Every task remains visible.
TAGS · ARTWORK · COMMENTS · ENCODER · CUSTOM FRAMES
View metadataread before you changeClean private fieldsremove identifying framesReplace artworkswap embedded artBatch tag filesrepeatable tag passTHRESHOLD · MIN GAP · PADDING · CROSSFADE
Trim edge silencekeep the take intactShorten pausesset a target gapSplit at silencedownload named partsL+R AVERAGE · LEFT / RIGHT · DUAL MONO · SWAP
Mono to stereodual monoExtract leftchannel 0 unchangedExtract rightchannel 1 unchangedSwap L/Rexchange decoded L and RCODEC · DURATION · BITRATE · SAMPLE RATE · CHANNELS · PEAK · LUFS
Metadata + peakread-only file factsLUFS meterreference fixtures firstLABREPRODUCIBLE CASES / SAMPLE DATA
These are transparent test fixtures—not customer claims. Each row exposes the input, method, and expected check.
REPRODUCIBLE FIXTURE / SAMPLE DATA / VERIFY BEFORE LAUNCHNo implied customer result
SNL-POD-01VISIBLE RULE−42 dBFS · minimum 320 ms padding 80 ms · crossfade 20 ms
EXPECTED CHECK34 pausesFixture target: output 06:58.1 Preview every cut before export.
SNL-META-02VISIBLE RULE8 written frames · version shown reopen and reread every written frame
EXPECTED CHECK8 / 8 fieldsaudio stream unchanged Compare fields before export.
SNL-CHAN-03VISIBLE RULEM = (L + R) / 2 do not imply spatial enhancement
EXPECTED CHECK48 kHz monoduration unchanged Check count, rate, duration, and peak.
METADATA WORKBENCH / PREVIEW BEFORE WRITE
A cover image is only one frame. The workspace also exposes core tags, version, privacy fields, and what the export will change.
MP3 / ID3v2.3 / 192 kbps / 44.1 kHz
● READ LOCALLYLOCAL PIPELINE / VISIBLE DATA BOUNDARY
The interface should say where the file is read, what is decoded, which rule runs, and what the export contains.
ONE FILE → ONE LOCAL TASK → ONE NEW EXPORTSERVER PATH: NONE01SELECTChoose one file02READLocal bytes + tags03TASKInspect or edit04PREVIEWShow delta / cuts05EXPORTWrite a new file01 / INPUTFILE PICKER / DRAG02 / PROCESSBROWSER WORKER03 / PREVIEWVISIBLE METHOD04 / OUTPUTNEW LOCAL FILETECHNICAL NOTES / METHOD BEFORE PROMISE
Each task needs a visible method, a non-goal, and a check before export.
01 / ID3 VERSION + FRAMESRead the current version, map supported frames, and preserve the audio stream for metadata-only export.
CHECK / REOPEN THE FILE AND READ EVERY WRITTEN FRAME02 / SILENCE DECISIONThreshold and duration decide eligibility. Padding and crossfade decide whether the edit sounds abrupt.
CHECK / AUDITION THE BOUNDARY, NOT JUST THE TOTAL SECONDS03 / CHANNEL MATHAverage L+R, keep one side, or duplicate mono to two channels. Name the operation.
CHECK / CHANNEL COUNT · DURATION · RATE · PEAK04 / ANALYZER + LUFS GATECodec facts are file inspection. LUFS becomes a promise only after BS.1770, gating, and true-peak fixtures pass.
FORMAT MATRIX / QUALIFIED SUPPORT
A format name is not a guarantee. Container, codec, browser decode, write path, and reference tests all affect the status.
Ship only after the named route’s fixtures pass.
Browser codec, container writer, or frame coverage belongs on the page.
Keep files, expected output, tolerance, and browsers visible.
WORKFLOW STORIES / HANDOFF PATTERNS
Practical scenarios, not testimonials. Each ends with a check another person can repeat.
CHECK / PUBLISH REFERENCE FILES AND TOLERANCE
PODCASTERA producer removes long room-tone gaps, keeps breaths, and gives the editor the threshold and padding used.
ARCHIVIST / FIELD RECORDERAn archive adds title, location, year, track, genre, and cover art while removing legacy Encoder notes.
QA HANDOFFA QA reviewer compares codec, sample rate, channels, duration, and expected changes before accepting a handoff.
FAQ / TECHNICAL DISCLOSURE
Privacy, method, output, and validation belong in the answer—not behind a vague “learn more” link.Privacy, method, output, and validation belong in the answer.
01Does Sonelora upload my audio?For workspaces labeled Local Mode, file bytes stay in browser memory and no upload request is required. Read the route disclosure before choosing a file.
ROUTE-SPECIFIC PRIVACY PROMISE02Can I edit ID3 tags without changing the audio stream?The metadata-only path rewrites selected tag frames and preserves the audio stream. Reopen the export and verify every field.
VERIFY THE WRITTEN FRAMES03How does stereo-to-mono conversion work?Choose the rule: average L+R or keep one side. The result should show channel count, rate, duration, and peak.
NAME THE CHANNEL RULE04How can silence removal be reproduced?Record threshold, minimum duration, padding, and crossfade; then preview every boundary before export.
THE CUT RULE STAYS VISIBLE05Is the LUFS meter production-ready?It remains a lab until BS.1770, gating, true-peak, and tolerance fixtures pass across the supported browsers.
LAB UNTIL VALIDATEDREADY WHEN THE METHOD IS VISIBLEEdit ID3 tags, remove silence, convert stereo or mono, or inspect file facts locally in your browser. Choose one job, see the rule, then export a new file.Edit ID3 tags, remove silence, convert stereo or mono, or inspect file facts locally in your browser.
NO SIGNUP · LOCAL ROUTES DISCLOSED · ORIGINAL UNTOUCHEDCHOOSE ONE JOB → SEE THE RULE → EXPORT A NEW FILENO SIGNUP · ORIGINAL UNTOUCHEDONE ROUTE / ONE INTENT01ID3 TAG EDITOR/id3-tag-editor02SILENCE REMOVER/silence-remover03STEREO / MONO/stereo-to-mono04FILE ANALYZER/audio-file-analyzer05LUFS LAB/lufs-meter