Key facts
- Brand
- Yamaha
- Model
- QY20
- Documents
- 3
- Languages
- EN
- Last added
- 2012-07-02
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Yamaha QY20 Music Sequencer MIDI Data Format Reference
This document provides a technical overview of the MIDI data format supported by the Yamaha QY20 Music Sequencer. It details the specific transmit and receive flows for various sections including the Tone Generator and Sequencer.
The manual specifies exact hexadecimal status bytes and data structures for Channel Voice Messages (Note On/Off, Control Change, Program Change) and System Real-Time Messages (Timing Clock, Start, Stop). It also covers Registered Parameter Numbers for tuning adjustments and System Exclusive messages for General MIDI mode switching.
Yamaha QY20 specifications
| MIDI Transmit Channels (Tracks 1-4, C1-C2, Bass) | Channels 1 through 7 |
|---|---|
| MIDI Transmit Channel (Drum track) | Channel 10 |
| Pitch Bend Change Resolution | 14 bits |
| Active Sensing Transmission Interval | Approximately every 175 milliseconds |
Source: Yamaha QY20 Music Sequencer MIDI Data Format Reference
All Yamaha QY20 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How many tracks can the device set voices for?
You can set track voice for four tracks, from track 1 to track 4.
Which MIDI channel does the Drum track transmit on?
The Drum track transmits on MIDI channel 10.
From: Yamaha QY20 Music Sequencer MIDI Data Format Reference
What is the resolution of the Pitch Bend Change message?
The resolution for Pitch Bend Change is 14 bits.
From: Yamaha QY20 Music Sequencer MIDI Data Format Reference
What happens to the voice when Program Change number p=0...127 is received in GM mode?
The device assumes the data is GM-format and selects appropriate voices; if none are available, the voice is turned off.
From: Yamaha QY20 Music Sequencer MIDI Data Format Reference
When does Exclusive Message reception occur?
It only occurs when the initial PLAY, VOICE, and PATTERN mode displays are showing; it does not occur in DEMO mode.
From: Yamaha QY20 Music Sequencer MIDI Data Format Reference