Extracting/Translating Parts of a MIDI Message
I'm trying to write a patch that takes MIDI Sysex / MSC commands and tells me what cue list and cue is being fired. I need to somehow extract the [command number] from the following string:
F0 7F [device_ID] 02 01 [command] [command_number] F7
Any tips or examples would be much appreciated.
You can use [zl nth] if it's single integer of a known list length. If the list length varies or the command number is more than one integer, there are other approaches.
Thanks for this. The command number will likely be more than one integer and the length will vary from scenario to scenario.
Play around with the family of [zl] objects... they are perfect for this sort of thing. You'll need to customize your approach depending on the situation.
the match object can also be useful:
Realizing this is hacked together here's what I have thus far:
I realize I need to go down the [zl] route as opposed to unpack. The examples have been very helpful thus far but here's what I'm running into. I need to extract the 7th integer through the end of the message which ends with 7F (the message will always vary in length). Furthermore, I need to translate these numbers into simple cue and cuelist numbers. Here's an explanation of what I'll see as my incoming commands:
In terms of cues, the device can potentially deal with all the available cues, so this gets a bit tricky since hexadecimal doesn't deal with decimals. The numbering scheme then is not hexadecimal.
Three simple rules:
1. Place a "3" in front of every digit of the number.
2. Place a "2E" wherever there is a decimal.
3. Place a "00" when separating a cue number from a cue list.
This can be represented by:
On the device: Cue xy/ab.c
In Hexadecimal: 3a 3b 2E 3c 00 3x 3y
Cue number examples:
On the device: Cue 1/54
In Hexadecimal: 35 34 00 31
On the device: Cue 4/101
In Hexadecimal: 31 30 31 00 34
On the device: Cue 10/55.6
In Hexadecimal: 35 35 2E 36 00 31 30