The current product IDs for the Multimedia extensions are as follows:
| Constant Name | Value | Description |
| MM_MIDI_MAPPER | 1 | Microsoft MIDI Mapper |
| MM_SNDBLST_MIDIOUT | 3 | Sound Blaster MIDI output port |
| MM_SNDBLST_MIDIIN | 4 | Sound Blaster MIDI input port |
| MM_SNDBLST_SYNTH | 5 | Sound Blaster internal synthesizer |
| MM_SNDBLST_WAVEOUT | 6 | Sound Blaster waveform input port |
| MM_SNDBLST_WAVEIN | 7 | Sound Blaster waveform input port |
| MM_ADLIB | 9 | Ad Lib-compatible synthesizer |
| MM_MPU401_MIDIOUT | 10 | MPU401 MIDI output port |
| MM_MPU401_MIDIIN | 11 | MPU401 MIDI input port |
| MM_PC_JOYSTICK | 12 | IBM Game Control Adapter |