Stereo Tool is a Winamp plugin that can be used to manipulate sounds.
It contains a singleband compressor, an 8-band multiband compressor, a lowpass filter and a stereo image manipulator.

The compressors can be used to make the playback volume and sound of different recordings more equal, or to remove loud peaks from recordings.

The stereo image manipulator can be used to repair phase shift problems in stereo recordings and to increase or decrease phasing and channel separation separately. It can also be used to convert sounds from stereo to mono, while preserving the fullness of the sound.

The lowpass filter is useful if certain frequencies need to be filtered out, for example the FM stereo pilot tone at 19 kHz if you send the Winamp output to an FM transmitter.

Two-channel multi-tone audio frequency sinusoidal signal generator is intended for adjusting and measuring parameters of audio equipment. Works with 16, 24 and 32 bit sound cards at sampling rate up to 384 kHz. Independent channels frequency and amplitude controls. Adjustable phase shift between channels. Up to eight oscillators per channel with separate frequency and level setting. A step of frequency setting is 0.00001 %; level - 0.001 dB; phase - 0.001 degree. The minimum coefficient of nonlinear and intermodulation distortion, precision, stability and range of frequency are limited only by quality of the used sound card. The Sweep Frequency Mode with adjustable rate in linear or logarithmic scale. Multi Oscillators Sweep Frequency Mode. Generation of noise: white, pink (1/f), Brownian (1/f^2). Mode of amplitude modulation of one channel by another. Real time signal synthesis. Recording of synthesized signals to hard disk. The demo is completely functional, but the time of sounding is limited to 15 seconds after each clicking of the "Start" button. The registration removes demonstration limitation.

The audio frequency sinusoidal signal generator is intended for adjusting and measuring parameters of audio equipment. Works with 16, 24 and 32 bit sound cards at sampling rate up to 384 kHz. Independent channels frequency and amplitude controls. Adjustable phase shift between channels. A step of frequency setting is 0.00001 %; level - 0.001 dB; phase - 0.001 degree. The minimum coefficient of nonlinear and intermodulation distortion, precision, stability and range of frequency are limited only by quality of the used sound card. The Sweep Frequency Mode with adjustable rate in linear or logarithmic scale. Multi Oscillators Sweep Frequency Mode. Generation of noise: white, pink (1/f), Brownian (1/f^2). Mode of amplitude modulation of one channel by another. Real time signal synthesis. Recording of synthesized signals to hard disk. The demo is completely functional, but the time of sounding is limited to 15 seconds after each clicking of the "Start" button. The registration removes demonstration limitation.

MBBuilder gives an opportunity to shift from the traditional programming interface elements in MapBasic commands to their visual design. Application project maintenance, writing and use the components, rapid contextual help in the integrated MBBuilder environment are simplifying the process of creating and abridges the phase checkout/debugging of the program.

MapBasic application development environment contains text editor, compiler and linker. Unfortunately, creating dialogs, menus and toolbars requires much time and routine work when describing them in specific MapBasic commands. Even greater efforts demand changing, adding and removing individual components of the interface during development.

Limitations:

· 30 day trial

Stereo Tool is developed as a free Winamp plugin that can be used to manipulate sounds.

It was originally created to repair phase shift problems in stereo recordings, but it can do a lot more, like keeping the playback of each song at the same volume.

Here are some key features of "Stereo Tool":

· A singleband compressor/limiter - This can be used to make soft sounds louder or loud sounds softer, and to reduce loud peaks in the sound.
· An 8-band multiband compressor/limiter - If one song contains a lot of bass, and the next contains a lot of treble, this filter can make them sound equal.
· A stereo separation widener/narrower - With this you can let both speakers play all the instruments at the same level (so if you only hear one speaker, you dont miss any sounds), and still keep a part of the stereo effect.
· A stereo phase shift widener/narrower - Useful if you have a mono output channel: Sounds converted to mono using this filter sound just as full and powerful as the original stereo recording. Also useful if you want to repair bad recordings that have stereo phasing problems, or if you just want to hear an increased stereo without moving the instruments. This enables transforming any recording to mono without audiable artifacts, and achieving better quality encoding for low bitrate MP3 files.
· A channel delay filter - Play back one channel with a small delay to create a fake stereo effect.
· A lowpass filter - Useful if you want to feed the Winamp output into an FM transmitter. This filter can completely remove any FM pilot tone interference. Also useful to hear how a recording would sound on an AM station etc.

Two-channel multi-tone audio frequency sinusoidal signal generator is intended for adjusting and measuring parameters of audio equipment.

Multi-Tone Sound Generator is a sound and signal generator with audio frequency.

Works with 16, 24 and 32 bit sound cards at sampling rate up to 384 kHz. Independent channels frequency and amplitude controls. Adjustable phase shift between channels.

Up to eight oscillators per channel with separate frequency and level setting. A step of frequency setting is 0.00001 %; level - 0.001 dB; phase - 0.001 degree.

The minimum coefficient of nonlinear and intermodulation distortion, precision, stability and range of frequency are limited only by quality of the used sound card.

The Sweep Frequency Mode with adjustable rate in linear or logarithmic scale. Multi Oscillators Sweep Frequency Mode.

Generation of noise: white, pink (1/f), Brownian (1/f^2). Mode of amplitude modulation of one channel by another. Real time signal synthesis. Recording of synthesized signals to hard disk.

The demo is completely functional, but the time of sounding is limited to 15 seconds after each clicking of the "Start" button.

The registration removes demonstration limitation.

Haunted House Echo Sound Effects lets you turn your computer into a sound effects machine. Mix up to 100 WAV. files at once into a loop, so they replay continuously at intervals that you determine.

Design your own soundscapes using recorded .WAVE files. The .WAV files are overlayed. This software comes with scary sounds for a haunted house type soundscape. Also includes voice distorter / phase shifter using FFT (Fast Fourier Transform). You will need a microphone hooked up to your computer to use this feature.)

Turn your computer into a sound effects machine. Mix up to 100 WAV. files at once into a loop, so they replay continuously at intervals that you determine.

Design your own soundscapes using recorded .WAVE files. The .WAV files are overlayed. This software comes with scary sounds for a haunted house type soundscape. Also includes voice distorter / phase shifter using FFT (Fast Fourier Transform). You will need a microphone hooked up to your computer to use this feature.)

Here are some key features of "Haunted House Echo Sound Effects":

· Create your own scoundscapes by arranging the sounds you want to play as frequently as you want to replay them.
· Mix .WAV files together in an endless loop.
· Scare the heck out of people coming to your door on Halloween.
· Voice Changer Included: Make your voice sound lower or higher using the phase shift option. The voice changer will shift your voice down 25 Hertz or up 25 Hertz.
· Adjust echo depth and decay levels


Limitations:

· 10 free uses

Flanger FL-ii has four main dial controls: Frequency, Depth, Delay and Feedback.

Flanger FL-ii is a useful utility which is commonly used for adding that 70s depth and phase feeling to your audio recordings. This is achieved through careful manipulation of overlapped waves in a time-lagged phase shift.

Limitations:

· 5 days trial

With the Harmonix plug-in, you are able to mix harmonic frequencies into complex waves.

Harmonix renders a single, horizontal line on the image, but this is no ordinary line. It is the result of superimposing up to ten separate harmonic frequencies, scaled to the screen.

You can change the up to ten harmonic frequencies in both amplitude (volume/height) and phase (offset/shift) and have precise control over the base frequency.

Use it to create realistic graphs or demonstrate how to create other basic waveforms from nothing but carefully selected harmonic frequencies.

From the harmonic sine waves you can mix together the "primitive" square, saw tooth and triangle waves but also more complex combinations.

Harmonix requires a Photoshop plug-in compatible graphics applications on Windows.

Here are some key features of "Harmonix":

· Configure up to 10 harmonic frequencies.
· Amplitude.
· Phase.
· Base frequency fine-tuning.
· Automatic normalization of result wave.
· Reliable preview.
· Fully calculated.
· Fully documented in help system.
· Save and load settings.
· Supports 8-bit RGB mode.

Voxengo PHA 979 description
Voxengo PHA-979 was designed to be an audio plug-in that will allow you to apply an arbitrary phase shift to the program materia Voxengo PHA-979 was designed to be an audio plug-in that will allow you to apply an arbitrary phase shift to the program material. What is meant by the phase shift here is a simultaneous shifting of all frequencies across the active frequency range of the signal by the given phase shift value. This process does not harm the phase relations within the signal being processed. For example, you can shift the phase of the signal by 90 degrees and then shift its phase by 180+90 degrees to get the original signal as a result. In PHA-979, this is achieved by using a linear-phase design.

PHA-979 can be very useful during mixing sessions, especially when working with the program material recorded through the microphone. In many cases this allows one to solve various phasing problems arising from the microphone placement chosen during tracking session. In other cases this process may help one to align drums to each other and to align the bass to drums and vice versa bringing punch and time coherence not attainable by the time aligning alone.

Another possible use of PHA-979 is for making stereo-field adjustments. These can be useful both in audio restoration applications and audio mixing. For example, some synth instruments may create a `too wide stereo field which becomes a problem when the mixed stereo material is later converted to mono: those `wide instruments simply disappear. By shifting one of the stereo channels--during mixing of the original instrument track--this problem can be resolved.

PHA-979 is a relatively CPU-consumptive plug-in with a considerable processing delay (latency). This means that this plug-in is best used with audio host applications which offer a freeze-like function along with a plug-in delay compensation.

Here are some key features of "Voxengo PHA 979":

· Arbitrary phase adjustments
· Phase control for each channel
· Two quality modes
· Linear-phase design
· Pan control
· "A-to-B" comparisons
· Mono-to-Stereo, Stereo-to-Stereo processing
· Sample rates up to 96 kHz supported
· Native assembler DSP code


Requirements:

· About 1 MB of harddisk space
· 1+ GHz processor
· Audio application supporting VST plug-ins


Limitations:

· Processing stops for a moment every 45 seconds.