The TAPE button is used to access the tape interface features of the MMT-8. This allows the user to save and retrieve sequence data with an ordinary cassette recorder. Pressing and holding the TAPE button results in the following display:
Pressing the RECORD button initiates the save to tape. Both buttons can now be released, since this operation may take over two minutes, during which the display will read:
The display shows the current part or song being output. This display will advance until all data is output. Pressing the STOP/CONTINUE button will abort the operation. Before pressing RECORD, the page up and page down buttons can be used to access the other five tape pages. They are as follows:
In all five of these pages, pressing RECORD initiates the operation. The verify function is used to ensure that the data just recorded to tape is good. LOAD ALL PARTS & SONGS FROM TAPE loads the entire sequence memory with the data on tape. LOAD ONE PART FROM TAPE and LOAD ONE SONG FROM TAPE allow a single part or song to be loaded from a tape. The keypad can be used to select the desired number. For operations involving output to tape, after pressing RECORD the display will change to the following:
When the initial tone on the tape is detected, the display shows (depending on the page shown when RECORD was pressed):
For sending data to the MIDI OUT port, pressing RECORD from the SEND ALL PARTS & SONGS OUT MIDI page results in the display showing:
Again, the RECORD and TAPE buttons can be released, and the display will continue until the operation is complete, with the currently loading or verifying part or song number being shown in the display. When loading one part or song, the display will continue to show the selected part or song number in the upper display. When sending out MIDI data, the display shown above will remain until the data has been sent out. After completion of the tape functions, the display will return to its previous state (select part or select song). If an error is encountered while loading from tape, the display will show ERROR as soon as it occurs, for example:
The tape will attempt to continue to load, but it is possible that the data will be corrupted and therefore unusable.
During any of the tape operations (but not the send MIDI function), the STOP/CONTINUE button can be used to abort the operation. The display will show:
When loading in all parts and songs, aborting the tape may leave unusable data in memory. When loading one part or song, aborting after the selected part or song has passed will not cause any problems.
Storing to disk using MIDI system exclusive data dump
The MMT-8 send to MIDI function is provided so that the data can be stored on a computer, a Yamaha MDF-1 (MIDI Filer) or a Yamaha DX-7IIFD. The data is sent out as one block of system exclusive data, with the length being determined by the amount of memory being used. If using the MIDI Filer, no more than 85% of the memory should be full or else the data will be too large for the MIDI Filer's buffer. No more than 25% of memory should be full when saving to a DX-7IIFD or its buffer will be filled as well. The MMT-8 will automatically receive MIDI system exclusive sequence data from any of these devices without having to select a specific page. If the system exclusive data starts to come in, the display will read:
This display will remain until the data has been completely loaded, after which the MMT-8 will return to song 99. Note that any time the MMT-8 receives sequence data from MIDI, any data previously in memory will be lost.