You can add data to a tempo track using IDirectMusicTrack8:SetParam(Ex) = with GUID_TempoParam and DMUS_TEMPO_PARAM. See: http://msdn.microsoft.com/library/default.asp?url=3D/library/en-us/direct= x9_c/directX/htm/guidtempoparam.asp This only changes the in-memory copy of the tempo track, and not what's = on the disk. How can we make this information more discoverable for = other developers? To change the data in a sequence track, you need to create an IStream = that represents the data in the track, query the track for the = IPersistStream interface and re-load the track. There is no equivalent = SetParam(Ex)-like method for sequence tracks. The stream must start = with and contain a <seqt> chunk, as described at: http://msdn.microsoft.com/library/default.asp?url=3D/library/en-us/direct= x9_c/directX/htm/sequencetrackchunk.asp -james This posting is provided "AS IS" with no warranties, and confers no = rights. -----Original Message----- From: directmusic-bounce@xxxxxxxxxxxxx = [mailto:directmusic-bounce@xxxxxxxxxxxxx] On Behalf Of Paul Stroud Sent: Tuesday, October 21, 2003 10:00 AM To: directmusic@xxxxxxxxxxxxx Subject: [directmusic] Re: Need to know about tracks You can only add data to a data track. All it does is trigger scripts = written within Direct music producer i.e. VB Perhaps there's another way if you're bypassing the whole DMP thing, but = I'd be out of my depth there I'm afraid > -----Original Message----- > From: directmusic-bounce@xxxxxxxxxxxxx=20 > [mailto:directmusic-bounce@xxxxxxxxxxxxx]On Behalf Of ziggy > Sent: 21 October 2003 16:46 > To: directmusic@xxxxxxxxxxxxx > Subject: [directmusic] Need to know about tracks > > > > Hello, is there a way to add some data to a track (sequence or tempo)=20 > , programmatically ? I did'nt found anything about that in the sdk > > > > Thanks... > > > > > > Siegfried Hand. > > Gaelyvan son & d=E9veloppement > > > > > >