Re: What is Controller-Number 6 in a Control-Change message?

Posted on 2021-07-12, 15:38

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by llm

in MT-32 Development

in MT-32 Development

found it! void Part::setDataEntryMSB(unsigned char midiDataEntryMSB) { if (nrpn) { // The last RPN-related control change was for an NRPN, // which the real synths don't support. return; } if (rpn != 0) { // The RPN has been set to something other than 0, // which is the only RPN that these synths …

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Re: What is Controller-Number 6 in a Control-Change message?

Posted on 2021-07-12, 15:29

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by llm

in MT-32 Development

in MT-32 Development

The coarse adjustment (usually set via Data Entry 6) sets the range in semitones. are these semitones also in range of 0-24?

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Re: Some Channel mode and Control change msgs - any idea what the Controller-Nrs are?

Posted on 2021-07-12, 08:02

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by llm

in MT-32 Development

in MT-32 Development

thank your for the source link - as usual - the best documentation

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Some Channel mode and Control change msgs - any idea what the Controller-Nrs are?

Posted on 2021-07-12, 07:26

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by llm

in MT-32 Development

in MT-32 Development

static inline void send_control_or_mode_change_midi_msg(uint8_t channel_, uint8_t controller_nr_, uint8_t controller_value_) { //(channel_ <= 15) //(controller_nr_ <= 119) ==> Control change //(controller_nr_ > 119) ==> Channel mode message send_midi_msg3(0xB0u + BITS4(channel_), BITS7(controller_ …

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Re: Strange Bender range address offset calculation

Posted on 2021-07-12, 07:22

by

by llm

in MT-32 Development

in MT-32 Development

thank you - the pictures getting clearer and clearer...

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Re: Strange Bender range address offset calculation

Posted on 2021-07-11, 16:01

by

by llm

in MT-32 Development

in MT-32 Development

in order trace of the midi-output - some of the mgs are based on the two functions i've talked about [code] PlayMsg cmd_buf: B9 07 7F <-- func0 with 0xB0 Base PlayMsg cmd_buf: C9 00 PlaySysex: F0 41 10 16 12 03 00 F7 <-- other functions that produces illformed msg PlayMsg cmd_buf: 84 00 79 PlayMsg …

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Re: Strange Bender range address offset calculation

Posted on 2021-07-11, 15:31

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by llm

in MT-32 Development

in MT-32 Development

i've further analysed the calling place for the functions - there is another function call right before that function which uses the very same value as as midi-channel (i think) its a "Control change" msg 0xB0 send_midi_msg3(0xB0u + BITS4(value), 7, BITS7(controller_value_)); ... if(value != 10) { …

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Re: Strange Bender range address offset calculation

Posted on 2021-07-11, 11:46

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by llm

in MT-32 Development

in MT-32 Development

so these are the address offset (as 7bit) for part 1-9 [0] part: 1, offset: 0x0000, high7: 0x00, low7: 0x00 [1] part: 2, offset: 0x0010, high7: 0x00, low7: 0x10 [2] part: 3, offset: 0x0020, high7: 0x00, low7: 0x20 [3] part: 4, offset: 0x0030, high7: 0x00, low7: 0x30 [4] part: 5, offset: 0x0040, …

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Re: Strange Bender range address offset calculation

Posted on 2021-07-11, 09:12

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by llm

in MT-32 Development

in MT-32 Development

sergm wrote on 2021-07-11, 07:55: Not sure, do you have the MT-32 MIDI implementation handy? If not, see http://www.synthzone.com/midi/roland/mt32/mt32-2.txt already got that document

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Re: Strange Bender range address offset calculation

Posted on 2021-07-11, 09:11

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by llm

in MT-32 Development

in MT-32 Development

I don't think this is wrong. Let us look at the address mapping of the patch temp area: Whole Part (accessible on unit#) Start Address Description ------------- ---------------------------- 03 00 00 Patch Temp Area (part 1) 03 00 10 Patch Temp Area (part 2) : 03 00 60 Patch Temp Area (part 7) 03 00 …

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Strange Bender range address offset calculation

Posted on 2021-07-11, 06:12

by

by llm

in MT-32 Development

in MT-32 Development

the game im reversing contains offset calculation code for the bender range 0x03 0x00 0x?4 this is the assembler code (same as in game, my build checks binary equality of my re-assembled version on every build) address_byte2 db 0x04 ... function getting this value mov al, value and al, 0Fh cmp al, …

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Re: What is Controller-Number 6 in a Control-Change message?

Posted on 2021-06-28, 19:30

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by llm

in MT-32 Development

in MT-32 Development

thank you both the mysterious and, or not bitshifting assembler code transforms more and more into simple midi msg generation

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Re: What is Controller-Number 6 in a Control-Change message?

Posted on 2021-06-28, 08:37

by

by llm

in MT-32 Development

in MT-32 Development

this is the reversed function - the game code missing the fine (0x26) data entry entry set - still valid this way - or a bug in the old code? static inline void near send_control_change_midi_msg(uint8_t channel_, uint8_t controller_nr, uint8_t controller_value_){...} static inline void near set_ …

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Re: What is Controller-Number 6 in a Control-Change message?

Posted on 2021-06-28, 06:59

by

by llm

in MT-32 Development

in MT-32 Development

BTW note, this stuff only works with newer MT-32 compatible hardware. The original "old" MT-32 ignores RPN controls altogether, and the pitch bender range can only be set via the respective SysEx messages. the game midi code im reversing contains both message types Brøderbund versions Stunts 1.0 ( …

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Re: What is Controller-Number 6 in a Control-Change message?

Posted on 2021-06-27, 21:59

by

by llm

in MT-32 Development

in MT-32 Development

thank you for the detailed description, do you know any documents, links containing this details

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Re: What is Controller-Number 6 in a Control-Change message?

Posted on 2021-06-27, 21:33

by

by llm

in MT-32 Development

in MT-32 Development

A "data entry" control change message shouldn't come on its own. It's part of the RPN/NRPN system. You first have to select a parameter number by writing an officially assigned 14-bit parameter number into controls 100 and 101 (B0 64 01 / B0 65 00) devices. ok before are two msg in this order B0 65 …

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What is Controller-Number 6 in a Control-Change message?

Posted on 2021-06-27, 20:48

by

by llm

in MT-32 Development

in MT-32 Development

i try to understand what the controller number 6 is - and what the meaning of the controller-value is when send to an MT32 device https://www.midi.org/specifications-old/item/table-1-summary-of-midi-message Control Change. 1011nnnn 0ccccccc 0vvvvvvv This message is sent when a controller value …

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Re: Need help to disect some Sysex Messages

Posted on 2021-06-22, 06:36

by

by llm

in MT-32 General

in MT-32 General

found it! according to the documentation only 7 bits of the address bytes are used

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Re: Need help to disect some Sysex Messages

Posted on 2021-06-22, 04:21

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by llm

in MT-32 General

in MT-32 General

MT32 Patch Memory address i've got a problem to understand a address jump in the Patch Memory address calculation the problem is that the Stunts game does not trigger that code - just not enough midi stream in a data file maybe old, maybe for another game of the company can anyone explain why there …

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Re: Need help to disect some Sysex Messages

Posted on 2021-06-15, 07:53

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by llm

in MT-32 General

in MT-32 General

Obvious question - which game is this? Stunts: https://www.mobygames.com/game/dos/stunts im reverse engineering and porting the MT15.DRV file (the MT32 sound plugin) of stunts to C source - because there a differences/bugs between the game versions and i want to build a unified/bug free version …

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