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- -------------------------------------------------------------------------------
- Background SoundTracker ModulePlayer v1.04 30-Aug-1990 17:23
- -------------------------------------------------------------------------------
- Coding & design by ALT_Man
-
- This little module will play the specified Amiga-soundtracker module until
- told to stop. It allocates space from the RMA to fit the module in so it's
- best to be at the supervisor '*' prompt when you load tunes. Use *PM to load
- the PlayerModule.
-
- Start a tune going using: *PlayMod <modulename>
- where <modulename> is the name of an Amiga soundtracker module. From version
- 1.00, automatic selection of 15 or 31 instrument format is performed.
-
- Note: Using a *PlayMod while one tune is playing will cause the first tune
- to be stopped and the second one loaded & started.
-
- Stop a tune playing with: *PlayStop
-
- Show information about a tune with: *PlayStatus
- This shows song name (not filename!), 15/31 instrument format, tune length, and
- module length.
-
- Set channel separation with: *PlayStereo <0|1>
- Where 0 is Archimedes channels (slight bias left/right so tunes can be heard
- out of single-speaker archies) and 1 is Amiga channels (full left/right).
-
- Sample rate is currently fixed at 29Khz per channel. Takes appx 25%-ish CPU time.
-
- This is now supplied in a RISC OS-type application: the directory includes this
- file, the 'PM' module, the programs 'playmoda' (plays 15 instrument modules,
- commented source), and 'playmoda2' (plays 31 instrument modules).
-
- Contact points:
-
- Voice: (0749) 72234 (ask for Hugo)
- (0831) 444192 (VodaFone)
- Data : (0749) 679794 (300-2400 - 1 line )
- (0749) 670030 (300-HST/V32 - 2 lines)
- Email: Prestel - 045847608, CIX - altman
- Snail: Hugo Fiennes, Burcott Manor, Wells, Somerset, BA5 1NH
-
- Please note that the code contained in this player and in 'playmoda' and
- 'playmoda2' is copyright (c)1988/1989/1990 Hugo Fiennes and may not be used in
- any commercial programs without prior permission from me. Use in public domain
- demos, your own programs is permitted, as is copying of the ENTIRE !STracker
- directory (not parts of it so as everyone gets all the files!). Please send me
- a copy of any demos you do using this routine (or any other routine!) so I can
- update the demo-library on my BBS!
-
- Have fun, y'all!
-
- ALT_Man
-
- Version 0.06 (first release version)
- ------------
-
- Version 0.07
- ------------
-
- - My address/contant numbers updated as we have moved!
-
- Version 1.00
- ------------
-
- - Now autoselects 15/31 instrument files. 32 instrument player source included.
-
- Version 1.01
- ------------
-
- - 32 instrument play now fixed!
-
- Version 1.02
- ------------
-
- - BIG problem with me not clearing top bit of picth incase it was used in 31
- instrument tunes!
-
- Version 1.03
- ------------
-
- - Fixed now so it never (fingers crossed) loses notes, I was storing a word instead
- of a byte in the 'newdata' bit (blush). PlayModA and PlayModA2 also updated with
- this fix! The problem ONLY occurred if the buffer filling was interrupted by the
- 'intr' routine (ie new note data), ie this was is you were running the player
- off interrupts. If you ran off VSYNC's (eg in main demo loop or whatever) then
- it is fine. Still, it's fixed now!
-
- - If you have problems with modules giving address exceptions: it is probably that
- the player can't work out what format the file is in: if the player finds a
- &78 (decimal 120, ascii 'x') at position &1D7 in the file it loads, it assumes it
- is a 15 instrument file. If you have 15 instrument files without this byte,
- load an editor (eg !Edit) and find byte &1D7 (decimal 471) using f5, and key
- [copy] (to delete that character), and then [x] (must be lowercase, this is the
- hex &78). Then the module will play just fine.
-
- Version 1.04
- ------------
-
- - Just got filetype allocation from Acorn. Official filetype for
- soundtracker modules is now &cb6.
-
- - Fixed problems with pitchbend on some tunes being a bit over-zealous and
- pitchbending off the top of the pitch range!
-
- - 31 instrument tunes now can access the top 16 instruments (at last!). I
- was checking the wrong bit last time... oops! PlayModA2 fixed to
- incorporate this change too.
-
- - PlayStereo command added which allows you to set the stereo separation.
-
- - A few bits fixed hopefully to stop spurious crashes (clear more variables
- before restarting...)
-