need to find audio file type

I'm not sure about a program that recognizes them...but there are literrally tons of extensions....here's a pretty complete list, hopfully this helps some:

[ Format, File Extension or Acronym - Association ]
AAC MPEG-2 Advanced Audio Coding video and sound file
ACD Acidized Sonic Foundry Project (.wav files) File (.acd)
ADM Adaptive Delta Modulation
ADPCM Adaptive Differential Pulse Code Modulation
AIFF Audio Interchange / Information File Format (Apple Computers, .aiff, .aif and .aifc compressed format)
AKP Akai S5000 and Akai S6000 Program File
APE Monkey's Audio digital audio file (.ape)
APT-X Audio Processing Technology compression algorithm
ARL Aureal Sound Bank File
ARR Steinberg Cubasis AV Arrangement File
ASF Microsoft Active Streaming Format (.asf)
ASX Microsoft Meta-file for redirection to an ASF streaming format file located on a HTTP Server (.asx)
ASFS Audiosoft format
ATRAC Adaptive Transform Acoustic Coding (Sony Mini-disc; Also as ATRAC-3)
AU Sun Audio Unix Workstation ulaw/NeXT Audio File ulaw
AVI Microsoft Audio Video Interleave File
AVR Audio Visual Reasearch, Atari computers
B4S ShoutCast Playlist format (Winamp 3)
BMO Blue Matter File (.bmo; also .bmr and .bmt)
BMW Buzz Machine Song File (without embedded sample)
BMX Buzz Machine embedded sample Song File
BNK Ad-lib Instrument File
BSE Bedeviled Sound Engine (Linux-based) samplr file (.bse)
BWF Broadcast Wave format subset specified by the European Broadcast Union
CBK Creative Labs Wave Blaster Sound Bank file
CDA Compact Disk Audio (sometimes as CD-DA)
CFX Crystal Audio Engine Audio real-time effects plug-in
CIN Crystal Audio Engine Audio Input
CMF Creative Labs Creative Music File
CYC Cakewalk Cyclone Groove Sampler embedded sample and settings File
CWO Crystal Audio Engine Audio Output
DIG SD Sound Designer I
DLS Down Loadable Sounds (.dls)
DMF Delusion Digital Music File
DMF XTracker Sound Module
DS DrumSynth .ds file
DSD Direct Stream Digital (Super Audio CD)
DSF Delusion Digital Sound File
DSI Dream Station Sounds (Audio Simulation)
DSM Digital Sound Module
DSP Dynamic Studio Professional Module
DSS Dream Station Songs (Audio Simulation)
DTM DigiTrekker Module
DTS Digital Theater Systems
DWD DiamondWare Digitized File
EA Emblaze Audio File
EFA Ensoniq ASR File
EFS Ensoniq SQ80 File
EMM IBM EMMS File (.emm)
ePAC Lucent Technologies Enhanced Perceptual Audio Coding
EPOC Psion series palmtop audio file
EXS24 Logic Audio sample audio file
FAR Farandole Composer Module
FLA Macromedia Flash File
FLAC FLAC (Free Lossless Audio Codec) lossless digital audio file (compatible with Ogg Vorbis)
FLP Fruity Loops Loop File (.flp)
FLT StarTrekker Sound Module
FSM Farandole Composer WaveSample
FST Fruity Loops Sample Instrument File (.fst)
F2R Farandole Linear Module
F3r Farandole Blocked Linear Module
FXP Steinberg HALion instrument file (.fxp)
GIG GigaStudio Native Instrument file (.gig)
GKH Ensoniq Disk Image (VFX, SD, EPS, ASR, TS)
GS MIDI Roland Instruments MIDI
GT2 GraoumfTracker Sound Module
IBK Instrument Bank File (FM sysnthesis)
IDF MS Windows Instrument Definition File
IFF Interchange Format File (IFF), Amiga Computers format
IMA ADPCM Interactive Multimedia Association Adaptive Differential Pulse Code Modulation
INS Cakewalk Instrument Definition File
INS Ensoniq Instrument File
IT Impulse Tracker
IVC Intervoice
KMP Korg Trinity KeyMap File
KRZ Kurzweil K2000 File
LA1 Liquid Audio File (.la1)
LAW Logic Audio song file
LQT Liquid Audio Track (.lqt)
LAVS Liquid Audio Secure Download (.lavs)
MDZ Cubic Player / OpenCP Module
MED MED/OctaMED Module; sometimes also as MMD0 through MMD3
MES a2b music file by AT&T (.mes)
MJF Mjuice Audio File (.mjf)
MND MusicNet Download File (.mnd)
MND RealOne Music Download File (.mnd)
MNS MusicNet Streaming File (.mns)
MOD Protracker/Fastracker/Startrekker Module, Amiga Computers
MOV Apple Quicktime and QDesign multimedia File (.mov)
MPC Akai MPC2000XL Sampler file (.mpc)
MPC MusePack (.mpc)
MPE Destiny MPE Secure Audio
MPEG-1 MPEG (Moving Pictures Experts Group) Layer 1 (.mp1)
MPEG-2 MPEG (Moving Pictures Experts Group) Layer 2 (.mp2)
MP3 MPEG (Moving Pictures Experts Group) Layer 3 (.mp3)
MPEG-4 MPEG (Moving Pictures Experts Group) 4 File (.mp4, .mpe)
MPG Moving Pictures Experts Group
MPGA MPEG Audio File (.mpga)
MTM MultiTracker Module
MT2 Mad Tracker 2 Sound Module
M3U .mp3 Playlist File (.m3u)
MX3 MPEG File (.mx3)
NAP Napster secure file
NST Noise Tracker Sound Module
NTX NETrax proprietary format of mcy.com
OGG Ogg Vorbis File (.ogg)
OKT Oktalizer Sound Module (spelled also Oktalyzer and Octalyser)
OMS Open Music System by Opcode
PAC SBStudio II Package or Song
PAC LPAC lossless digital audio file (.pac)
PAF PARIS (Professional Audio Recording Integrated System) by Ensoniq Audio File
PAT Gravis Ultrasound Patch
PBF Pinnacle Bank File (Turtle Beach)
PCA Perfect Clarity Audio (Sonic Foundry)
PCM Pulse Code Modulation (Uncompressed Raw Sound File) (.pcm)
PLS ShoutCast Playlist File (.pls)
PSM Protracker Studio Module
PTM PolyTracker Sound Module
QDX Q Design
RA RealAudio (.ra)
RAM RealAudio Meta-file for redirecting to an RM streaming format file on an HTTP or Real server (.ram, also .rmm)
RAW PCM Signed Raw Sound File
RCY Propellerheads ReCycle .rcy sample file
REX Propellerheads ReCycle .rex sample file
RIFF Resource Interchange Format File, WAV is a subset of this format
RJM RealAudio 8 File (.rjm, Native format from RealNetworks)
RM RealMedia File (.rm; also .rmx, .rmj, .rms)
RMI An RIFF MIDI format that includes copyright and non performance data (MS Windows)
RMF Rich Music Format by Beatnik (.rmf)
RMP RealJukebox Track info package file (.rmp)
RMVD RealMedia VBR File (.rmvd)
ROL Ad-Lib Sound File
RPM Real Player Media
RTM Real Tracker Sound Module
RTS Real Tracker sample file
RX2 Propellerheads ReCycle 2.0 .rx2 sample file
SACD Sony/Philips Super Audio Compact Disk
SAF Secure Audio Format (InterTrust)
SBK Emu SoundFont Bank (AWE32 Sound Bank) (.sbk)
SBI Creative Labs Sound Blaster Instrument file
SDII Sound Designer II by Digidesign (also as .sd2 or Session8 on Windows)
SDK Roland S-550/S-50/W-30 Disk Image
SDS MIDI Sample DUMP Standard File
SDS MIDI SDS
SDX Sample DUMP Exchange File
SES Cool Edit Session File
SF IRCAM Sound File (also as .sf)
SF2 SoundFont, version 2 (EMU-Systems) (.sf2)
SFD SoundStage Sound File Data
SFR Sonic Foundry
SHN Shortened File by Softsound (.shn)
SID Sound Interface Device format from Commodore 64
SKD SSEYO Koan Design File (.skd)
SKM SSEYO Koan Mix File (.skm)
SKP SSEYO Koan Play encryption File (.skp)
SKT SSEYO Koan Template File (.skt)
669 Composer Tracker File
SMP Samplevision File or Ad Lib Sampler
SMP Turtle Beach
SND Either a NeXT SoundStruct file format or Apple format
SND Sounder / Soundtools (.snd)
SNG Tandy mod file
SOU SBStudio II Sound File
S22 Digigram; also S32
STM Scream Tracker 1 & 2
STX Scream Tracker Module
ST3 Scream Tracker 3
S3I Digiplayer/ST3 Sample File
S3M Scream Tracker version 3 Module, also sometimes as S3Z
SVX Amiga Computers SVX, sometimes also as 8SVX
SWA Shockwave audio format
SWF Shockwave file format (.swf)
SYN SimSynth 1 and 2
SYW Yamaha SY-85/SY-99 Wave File
SYX Yamaha XG compatible project file (saving and loading)
SYX MIDI System Exclusive File
TRK Mixman Studio
TXW Yamaha TX-16W Wave File
ULT UltraTracker Sound Module
UMX Unreal Music File
UNI UNIMOD Sound Module
UWF UltraTracker WaveSample
V8 Covox V8
VBA VBase ADPCM File
VCE Natural MicroSystems VCE File
VOC Creative Lab's SoundBlaster/Creative Voice Sound File (.voc)
VOX Dialogic Vox ADPCM File
VOX Pika ADPCM File
VQF Yamaha Sound TwinVQ (.vqf)
WAV Microsoft Windows file format, RIFF Waveform Audio (.wav)
WMA Microsoft Windows Media Audio (.wma)
WOW Grave Composer
WVC WavePack digital audio file (.wvc)
WVE Psion series palmtop audio file
XG MIDI Yamaha instruments MIDI
XGP Yamaha XG parameter files (for Loading only)
XI Fastracker 2.0 Extended Instrument File
XM Fastracker 2.0 Module
XM XM Audio
XPL MP3 Playlist File (.xpl)
XWS Yamaha XGworks Original File/XGworks Original File with .wav