The current release handles the following audio file formats:(:table border=0:)(:cellnr:)* Raw files in various binary formats* Raw textual data* Amiga 8svx files* Apple/SGI AIFF files* SUN .au files** PCM, u-law, A-law** G7xx ADPCM files (read only)** mutant DEC .au files** NeXT .snd files* AVR files* CDDA (Compact Disc Digital Audio format)* CVS and VMS files (continuous variable slope)* Grandstream ring-tone files* GSM files* HTK files* LPC-10 files* Macintosh HCOM files* Amiga MAUD files* AMR-WB & AMR-NB (with optional libamrwb & libamrnb libraries)* MP2/MP3 (with optional libmad, libtwolame and libmp3lame libraries)* Opus files (read only; with optional Opus libraries)(:cell:)* Ogg Vorbis files (with optional Ogg Vorbis libraries)* FLAC files (with optional libFLAC)* IRCAM SoundFile files* NIST SPHERE files* Turtle beach SampleVision files* Sounder & Soundtool (DOS) files* Yamaha TX-16W sampler files* SoundBlaster .VOC files* Dialogic/OKI ADPCM files (.VOX)* Microsoft .WAV files** PCM, floating point** u-law, A-law, MS ADPCM, IMA (DMI) ADPCM** GSM** RIFX (big endian)* WavPack files (with optional libwavpack library)* Psion (palmtop) A-law WVE files and Record voice notes* Maxis XA Audio files** EA ADPCM (read support only, for now)* Pseudo formats that allow direct playing/recording from most audio devices* The "null" pseudo-file that reads and writes from/to nowhere(:tableend:) The audio effects/tools included in this release are as follows: * Tone/filter effects** allpass: RBJ all-pass biquad IIR filter** bandpass: RBJ band-pass biquad IIR filter** bandreject: RBJ band-reject biquad IIR filter** band: SPKit resonator band-pass IIR filter** bass: Tone control: RBJ shelving biquad IIR filter** equalizer: RBJ peaking equalisation biquad IIR filter** firfit+: FFT convolution FIR filter using given freq. response (W.I.P.)** highpass: High-pass filter: Single pole or RBJ biquad IIR** hilbert: Hilbert transform filter (90 degrees phase shift)** lowpass: Low-pass filter: single pole or RBJ biquad IIR** sinc: Sinc-windowed low/high-pass/band-pass/reject FIR** treble: Tone control: RBJ shelving biquad IIR filter * Production effects** chorus: Make a single instrument sound like many** delay: Delay one or more channels** echo: Add an echo** echos: Add a sequence of echos** flanger: Stereo flanger** overdrive: Non-linear distortion** phaser: Phase shifter** repeat: Loop the audio a number of times** reverb: Add reverberation** reverse: Reverse the audio (to search for Satanic messages ;-)** tremolo: Sinusoidal volume modulation * Volume/level effects** compand: Signal level compression/expansion/limiting** contrast: Phase contrast volume enhancement** dcshift: Apply or remove DC offset** fade: Apply a fade-in and/or fade-out to the audio** gain: Apply gain or attenuation; normalise/equalise/balance/headroom** loudness: Gain control with ISO 226 loudness compensation** mcompand: Multi-band compression/expansion/limiting** norm: Normalise to 0dB (or other)** vol: Adjust audio volume * Editing effects** pad: Pad (usually) the ends of the audio with silence** silence: Remove portions of silence from the audio** splice: Perform the equivalent of a cross-faded tape splice** trim: Cuts portions out of the audio** vad: Voice activity detector * Mixing effects** channels: Auto mix or duplicate to change number of channels** divide+: Divide sample values by those in the 1st channel (W.I.P.)** remix: Produce arbitrarily mixed output channels** swap: Swap pairs of channels * Pitch/tempo effects** bend: Bend pitch at given times without changing tempo** pitch: Adjust pitch (= key) without changing tempo** speed: Adjust pitch & tempo together** stretch: Adjust tempo without changing pitch (simple alg.)** tempo: Adjust tempo without changing pitch (WSOLA alg.) * Mastering effects** dither: Add dither noise to increase quantisation SNR** rate: Change audio sampling rate * Specialised filters/mixers** deemph: ISO 908 CD de-emphasis (shelving) IIR filter** earwax: Process CD audio to best effect for headphone use** noisered: Filter out noise from the audio** oops: Out Of Phase Stereo (or `Karaoke') effect** riaa: RIAA vinyl playback equalisation * Analysis `effects'** noiseprof: Produce a DFT profile of the audio (use with noisered)** spectrogram: graph signal level vs. frequency & time (needs `libpng')** stat: Enumerate audio peak & RMS levels, approx. freq., etc.** stats: Multichannel aware `stat' * Miscellaneous effects** ladspa: Apply LADSPA plug-in effects e.g. CMT (Computer Music Toolkit)** synth: Synthesise/modulate audio tones or noise signals** newfile: Create a new output file when an effects chain ends.** restart: Restart 1st effects chain when multiple chains exist. * Low-level signal processing effects** biquad: 2nd-order IIR filter using externally provided coefficients** downsample: Reduce sample rate by discarding samples** fir: FFT convolution FIR filter using externally provided coefficients** upsample: Increase sample rate by zero stuffing   + Experimental or incomplete effect; may change in future. Multiple audio files can be combined (and then further processed witheffects) using any one of the following combiner methods: * concatenate* mix* merge: E.g. two mono files to one stereo file* sequence: For playing multiple audio files/streams