MT32 Hyper Midi program notes: written by Don Browne 4/92
If for any reason things seem to hang or take a long time, hit “command .” (command, period) to stop what ever is happening so you can then continue.
If you change hypercard screens you will lose any sounds you have loaded or modified and will have to reload or modify again, so don’t move out of the editor screen unless you are prepared to lose your loaded settings or save them first. This program is time consuming since it takes about 30 seconds to send changes to the mt32 and if you make one change at a time, it will take a long time. But it is good for learning what the various filters do to a sound by slowly making one change at a time and listening to the difference it make.
1. make sure mt3’s 2 midi cables are plugged in for both midi in and midi out.
2. Set “Temp” button in memory section at upper right of hypermidi screen (Always use “Temp” when “getting” sound settings from the MT32.
3. Select “Snd” from slider at bottom right of screen to select which MT32 sound you want. After selecting, any of the 128 sound on the mt32 can be played on the screen keyboard.
4. Select which part number (1-8) you want to change on the mt32 by using “Patch” slider lower left of screen. This slider selects any of the parts 1 through 8 on the mt32 and after selecting the sound will play on the screen keyboard. The “Part” slider next to it refers to the “partial” number of the sound. There are 1 to 4 partials for the various sounds on the mt32. See you Sound List that came with the mt32 to see how many partial the sound contains and then edit any of them if you desire.
5. Load mt32 sound by selecting “Get Patch” and “Get Partial”. “Get Partial will tak 30 seconds or so to load the partial from the mt32. “Get Patch” sends the name to the screen display, “get Partial” sends the sound settings to the computer.
6. The appropriate sound loaded’s name will show in the window next to “Get Partial”.
7. Now you are ready to modify the sound by using sliders in main screen changing the Wave, Pitch, TVF and TVA rows respectively, locations as indicated by the diagram at upper left under “Load” button which indicated where those 4 sections are found in the main sliders in the middle of the screen. (Refer to my 2-page note on all the sliders and what they mean and what they do.)
8. To hear your adjustments, select “2” from the slider named “GRP” at bottom left of screen to send sounds the “memory section” of the mt32, then select “Whole” button in upper right in memory section (Always? use “Whole” button when sending sounds to the MT32) and then “Send Partial” which sends the adjustments to the MT32 and then you can play the sound on the keyboard. It takes about 30 seconds to load. (The “Tools” at the upper right produces a button for “Timing” under “Temp” which will read out in a message box the amount of time it took to load if you’re curious about it.). You can save your settings by using the “Save” button and can change the sound name by typing in the name in the name box. “Send Patch” will send the name to the mt32 display screen.
9. To try out the “Heavy Metal” sound example that come with the Hypermidi program, select “Load” in upper left hand corner of screen which opens the typical file selection screen, then locate the file you want to open “Heavy Metal” and select it to open. Then make sure the “Whole” button is selected in the upper right hand corner of Hypermidi and then “Send Partial” and “Send Patch” to send it to the MT32. (Takes about 20 seconds to load Partial). “Send patch” sends the name to the mt32 display screen, “send partial” sends the actual sound settings. Now you can play the sound on the screen keyboard and the sound shows up as “Memory” with the name “Heavy Metal” in your MT32 and stays there unless you reset the MT32 or turn it off or load another sound into the MT32 memory.
10. Notice that the “WN” slider in the Wave Generator section now is number 40. This indicates the sound is using the “PCM” type of partial as opposed to the “Synth” partial of either square wave or sawtooth wave. You can now adjust that WN slider to any other number and then “Send Partial” to hear other new sound using the 128 available 16-bit sampled PCM type waveform partials. Note that the Time Variant Filter section (TVF) is not operable with PCM partials. TVF is only for “Synth” partials; square waves or triange waves.
11. I don’t know how to use the “PCM Demo 1” file that comes with the program. PCM refers to one of the two types of partials the mt32 can use to make sounds. PCM partials are 16-bit sampled waveforms and there are 128 available on the mt32. The PCM selection slider is “WN” in the Waver Generator section, but I haven’t figured out how to use this “PCM demo 1” yet. It loads ok but doesn’t send the partial out to the MT32 without an error message.
12. Remember, when getting patches from the mt32 set the memory button (top right) to “temp” and when sending to the MT32 set memory button to “whole”.
13. The “Send System” button, bottom right, sends the reverb settings to the mt32.
