# SND_InvalidateWaveData

## C Specification

      #include <nitro/snd.h>

      void SND_InvalidateWaveData( const void* start, const void* end );

## Arguments

`start` | The starting address of the data being invalidated.
`end` | The ending address of the data being invalidated.

## Return Values

None.

## Description

Invalidates waveform data.

Any sound that is playing using waveform data from inside the specified region gets forcibly stopped.

### Caution

This function can only stop sounds in a playing sequence. It cannot stop waveform data played using the `SND_SetupChannelPcm` function.

This function is an ARM7 reserved function. After this function is called, processing occurs only after the command is issued with the `SND_FlushCommand` function.

When it is necessary to synchronize something with the completion of the process, first use `SND_GetCurrentCommandTag` to obtain the command tag immediately after calling this function. After the command is issued, use the command tag and call either the `SND_IsFinishedCommandTag` or `SND_WaitForCommandProc` function to confirm that the process has finished or to wait for it to complete.

## See Also

`SND_SetupChannelPcm, SND_FlushCommand, SND_GetCurrentCommandTag, SND_IsFinishedCommandTag, SND_WaitForCommandProc`

## Revision History

02/17/2005 Added a note about ARM7 command processing
07/20/2004 Initial version

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