|
Querying MIDI Output Devices
Before playing a MIDI file, you should use the midiOutGetDevCaps function to determine the capabilities of the MIDI output device that is
present in the system. This function takes an address of a MIDIOUTCAPS structure, which it fills with information about the capabilities of the
given device. This information includes the manufacturer and product identifiers, a
product name for the device, and the version number of the device driver
(specified in the wMid, wPid, szPname, and vDriverVersion members, respectively).
MIDI output devices can be either internal synthesizers or external MIDI
output ports. The wTechnology member of the MIDIOUTCAPS structure specifies the technology of the device.
If the device is an internal synthesizer, additional device information is
available in the wVoices, wNotes, and wChannelMask members. The wVoices member specifies the number of voices that the device supports. Each voice
can have a different sound or timbre. Voices are organized into MIDI channels.
The wNotes member specifies the polyphony of the device  that is, the maximum number of notes that can be played simultaneously. The wChannelMask member is a bit representation of the MIDI channels that the device responds
to. For example, if the device responds to the first eight MIDI channels, wChannelMask is 0x00FF. If the device is an external output port, wVoices and wNotes are unused, and wChannelMask is set to 0xFFFF.
The dwSupport member of the MIDIOUTCAPS structure indicates whether the device driver supports volume changes, patch
caching, and streaming. Volume changes are supported only by internal
synthesizer devices. External MIDI output ports do not support volume changes. For
information about changing volume, see Changing Internal MIDI Synthesizer Volume.
| Last news from Greatis Software |
 |
|
Nostalgia .Net |
|
.Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More » |
| Recommended software for developers |
 |
|
Ultimate Pack |
|
Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More » |
 |
|
Form Designer .Net |
|
Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More » |
 |
|
Print Suite .Net |
|
Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More » |
 |
|
Gradient Controls .Net |
|
Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More » |
 |
|
Greatis iGrid |
|
iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More » |
All the contacts and projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET More Online Helps Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages
|
