The latest released version of QTMPlayer is 0.25, as included with QTMPlay 2.26 and above.

0.02

• Finally completed all layer functions

0.03

• Preserved volume, tss, quality between layers

0.04

• Restructured header format and added QTMPlayer_Info SWI
• Changed errors in error messages
• Fixed small bug that crept in to do with RecogniseFile
• Added skip in so that layers weren't remounted when playing another song

0.05

• Changed SWI prefix and module name to QTMPlayer
• Added position find/set
• QTMPlayer automatically loads and kills modules as reqd - hurrah!
• Fixed small bug where QTMPlayer_Load used the wrong detection type to find out if a layer was engaged
• Tightened up layer validity checking on entry to SWIs
• Fixed problems with quality/volume/TSS preserve between layers

0.06

• Fixed rather major bug to do with dismounting layers and remounting others

0.07

• Added skeleton carousel support
• Fixed bugs to do with not checking fatality indicator on entry to finalisation code
• QTMPlayer_RecogniseFile automatically detects file type
• Fixed loads of clumsy bugs in RecogniseFile and Load
• Carousel support finished (more or less)
• Changed layers to directories
• Changed layer format accordingly
• Changed SWI chunk base (Acorn allocated!)

0.08

• Added fail and continue code for callback. If all songs have failed, carousel stops, too!
• Fixed QTMPlayer_Position bugs
• Fixed problems on finalisation when reloading QTMPlayer (-carousel)
• Added documentation on QTMPlayer_Choices SWI (it wasn't in documentation, and SWI numbers for SWIs higher than it were wrong!)

0.10

• Moved all writable values into workspace for the kernel (phew!) and fixed several bugs in the process
• Added QTMPlayer_Info(3) mainly for debugging
• Fixed those damn QTMPlayer_Position bugs once and for all!

0.11

• Enabled carousel support (no testing as yet, though)
• Made layer_dismount() a separate function
• Removed several silly bugs that never showed up before because of other bugs
• Wrote Xenakis8 layer

0.12

• Added bit on enter_layer() to stop it branching to null words in the jump table
• Major change -- made layers load songs into dynamic area/sprite area
• Lost "Library" source code -- reconstructed it from a (fairly) old backup
• Made FNlog/logf preserve state of V bit (caused several errors before)
• Fixed several bugs (most of them introduced during this version)
• Stopped song before trying to load a new one (otherwise layers like Xenakis give an error 'can't load a song whilst one is playing'
• Updated to 1.40 of DSymphonyPlayer but didn't fix 8 channels bug
• Changed absence of sample name returned from the Symphony layer into 'Not supported'
• Changed workspace pointer to R12 on entry to layer stubs
• Made QTMPlayer actually pass the value in R0 of the layer's pathname when calling start()
• Added skeleton matrixTRK support
• Added null-branch-word in recognise stub support. If the branch word is zero for the recognise stub, QTMPlayer scans through the list of filetypes instead
• Added extra layer of protection so none of the SWIs will budge unless a layer has been loaded in (apart from QTMPlayer_Layer, of course)
• Fixed small typo in Carousel
• Made QTMPlayer StrongARM compatible!
• Made sure that when a non-existant file was loaded QTMPlayer didn't try to reserve whatever value was returned in R4 for the song, and traps the non-file type return in R0 properly

0.20 Largely rewritten parts in v0.20 incompatible with earlier versions

• Memory wastages removed (in the workblock)
• Stack usage optimisation
• Sample SWIs consolidated into a single SWI : QTMPlayer_Sample
• SWIs reordered
• QTMPlayer_RecogniseFile renamed to QTMPlayer_Recognise
• QTMPlayer_TransparentSoundSystem renamed to QTMPlayer_SoundSystem and made into a generic sound-system interface (the only thing that can be set at present is the TSS state)
• SongName/Author/Duration consolidated into QTMPlayer_SongInfo SWI
• Strings that previously return NULL now return a pointer to a null string instead (stops silly crahses)
• QTMPlayer_Load extended to recognise file and load in one pass
• Rewrote layer loader routine to be faster and (hopefully) less bug-ridden!
• Finally supported filesize stub
• Changed to version 1.27 of QTMTracker
• Upgraded Xenakis layers not to attempt to reserve any file size (Xenakis uses RMA)
• Added facility to play a sample at a specified note value and volume
• Fixed Coconizer layer (complained of missing error block)
• I've finally spotted the cause of the address exception on loading dodgy files bug -- QTMPlay was trying to access an error pointer that was inside an *RMKill'd module. I fixed it by copying out any errors returned from layers
• I also found out that the bug specific to loading zero-length files of protracker type is actually a bug in QTMTracker (or the OS...). I made a work-a-round in the layer to return an error if anyone tries to load a zero-length file

0.21

• Added a few missing V_set_on_exit handlers
• Changed the non-fatal initialisation code so that it would work
• Fixed broken matrixTRK loading support

0.22

• Increased amount of extra module loading space to 16k
• Added Tracker support

0.23

• Removed auto-start from load stub

0.24

• Updated DSymphony to SA-compatible version
• Updated matrixTRK to v0.89, provisional SA-compatible version
• Updated Tracker to v4.09, SA-compatible version

0.25

• Added DSym_ResetParams and name-checking to DSym layer
• Replaced Dynamite song areas with RMA ones on pre-RISC OS 3.5 machines (locked Dynamite heaps were fragmenting badly)
• Added diagnostics to matrix_TRKValidity errors
• Finally fixed matrixTRK loading problem -- I'd accidentally replaced the "matrixTRK" file with the 8 channel version!
• Added C-veneers
• Traced finalise errors to a SYS "QTMPlayer_Unload" in QTMPlay, when QTMTracker claimed "Bad vector release". In layer_dismount, one of the registers was getting trashed when QTMTracker returned an error, and QTMTracker subsequently did a Ldr r1,[rx,#offset] and caused an address exception
• Added QTMPlayer_Layer 2 (supported functions) SWI