// Error codes returned by BASS_ErrorGetCode()
BASS_OK = 0; // all is OK
BASS_ERROR_MEM = 1; // memory error
BASS_ERROR_FILEOPEN = 2; // can't open the file
BASS_ERROR_DRIVER = 3; // can't find a free sound driver
BASS_ERROR_BUFLOST = 4; // the sample buffer was lost
BASS_ERROR_HANDLE = 5; // invalid handle
BASS_ERROR_FORMAT = 6; // unsupported sample format
BASS_ERROR_POSITION = 7; // invalid position
BASS_ERROR_INIT = 8; // BASS_Init has not been successfully called
BASS_ERROR_START = 9; // BASS_Start has not been successfully called
BASS_ERROR_ALREADY = 14; // already initialized/paused/whatever
BASS_ERROR_NOCHAN = 18; // can't get a free channel
BASS_ERROR_ILLTYPE = 19; // an illegal type was specified
BASS_ERROR_ILLPARAM = 20; // an illegal parameter was specified
BASS_ERROR_NO3D = 21; // no 3D support
BASS_ERROR_NOEAX = 22; // no EAX support
BASS_ERROR_DEVICE = 23; // illegal device number
BASS_ERROR_NOPLAY = 24; // not playing
BASS_ERROR_FREQ = 25; // illegal sample rate
BASS_ERROR_NOTFILE = 27; // the stream is not a file stream
BASS_ERROR_NOHW = 29; // no hardware voices available
BASS_ERROR_EMPTY = 31; // the MOD music has no sequence data
BASS_ERROR_NONET = 32; // no internet connection could be opened
BASS_ERROR_CREATE = 33; // couldn't create the file
BASS_ERROR_NOFX = 34; // effects are not enabled
BASS_ERROR_NOTAVAIL = 37; // requested data is not available
BASS_ERROR_DECODE = 38; // the channel is a "decoding channel"
BASS_ERROR_DX = 39; // a sufficient DirectX version is not installed
BASS_ERROR_TIMEOUT = 40; // connection timedout
BASS_ERROR_FILEFORM = 41; // unsupported file format
BASS_ERROR_SPEAKER = 42; // unavailable speaker
BASS_ERROR_VERSION = 43; // invalid BASS version (used by add-ons)
BASS_ERROR_CODEC = 44; // codec is not available/supported
BASS_ERROR_ENDED = 45; // the channel/file has ended
BASS_ERROR_UNKNOWN = -1; // some other mystery problem

WinXP если что.