Convert v2 Yamaha SMAF Reference Tone
Real Yamaha SMAF audio payload encoded from the same deterministic 0.7-second mono reference tone for legacy import coverage. Stable P8 artifact p8-convert-legacy-mmf.
| property | expected |
|---|---|
| durationSeconds | 0.7 |
| signal | reference tone |
Specifications
- Source
- deterministic mono tone
- Duration Seconds
- 0.7
- Delivery Mode
- download-only
- Provider
- converter-v2
- Provenance
- Synthetic deterministic P8 fixture generated by generation/p8_content.py; seed namespace 2026082300
- Fixture Reserve
- convert-v2
Testing contract
Expected to pass- Scenario
- Demux and decode the Yamaha SMAF source to PCM, then measure duration and signal energy.
- Expected result
- A positive 0.7-second reference tone decodes with nonzero RMS and no truncated final frame; the container is treated as download-only.
What is a .mmf file?
MMF commonly denotes Yamaha's SMAF mobile-music format, a binary multimedia container used for ringtones and handset audio. It is organized as typed chunks that can carry score data, sampled wave data, graphics, and control information, with device-era encoding constraints unlike a general WAV or MIDI file.
How to use this file
Use an example .mmf file to test SMAF signature and chunk parsing, metadata and duration extraction, safe handling of an unsupported codec, and download-only behavior in browsers that cannot decode the format.
How to use this file for testing
“Convert v2 Yamaha SMAF Reference Tone” is a deterministic Novus Examples fixture for Conversion testing, Audio analysis. The same content exported across many formats and linked as a group, so you can convert one and diff against the expected twin.
Documented properties for this file: MMF · 3,164 bytes. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.
Media fixtures are short and synthetic by design. Prefer waveform or transcript ground truth in the same group when measuring ASR, trim, upscale, or sync tools; do not assume broadcast-quality masters.
Related files
- dtsConvert v2 DTS Coherent Acoustics Reference ToneReal DTS Coherent Acoustics audio payload encoded from the same deterministic 0.7-second mono reference tone for legacy import coverage. Stable P8 artifact p8-convert-legacy-dts.
- wav1 kHz Tone @ 16000 Hz Sample Rate (WAV)A 1 kHz sine tone sampled at 16000 Hz — part of a sample-rate ladder (8/16/44.1/48/96 kHz) of the identical tone, for testing resampling, sample-rate detection, and aliasing.
- wav1 kHz Tone @ 44100 Hz Sample Rate (WAV)A 1 kHz sine tone sampled at 44100 Hz — part of a sample-rate ladder (8/16/44.1/48/96 kHz) of the identical tone, for testing resampling, sample-rate detection, and aliasing.
- wav1 kHz Tone @ 48000 Hz Sample Rate (WAV)A 1 kHz sine tone sampled at 48000 Hz — part of a sample-rate ladder (8/16/44.1/48/96 kHz) of the identical tone, for testing resampling, sample-rate detection, and aliasing.
- wav1 kHz Tone @ 8000 Hz Sample Rate (WAV)A 1 kHz sine tone sampled at 8000 Hz — part of a sample-rate ladder (8/16/44.1/48/96 kHz) of the identical tone, for testing resampling, sample-rate detection, and aliasing.
- wav1 kHz Tone @ 96000 Hz Sample Rate (WAV)A 1 kHz sine tone sampled at 96000 Hz — part of a sample-rate ladder (8/16/44.1/48/96 kHz) of the identical tone, for testing resampling, sample-rate detection, and aliasing.
Generated by generation/p8_content.py. Free for any use, no attribution required — license.