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Authentic Sound Studio

Main Control Panel

Carbon Version

Many areas on the picture have been linked to text descriptions. Click on any of these links to find out more.

Version(s) 1.0 through 1.03 ... Version 1.04 looks slightly different.

Version 1.04 looks slightly different... top



Track Area

In Track Mode this is where you record and playback tracks. By adding tracks to a playlist you can effectively overdub as you record.Choose "Playback while recording" and all tracks on the playlist (except the current track) will be played as you record. Recording in this manner synchronizes tracks that will later be mixed into a single file.




Volume Control Area

When tracks or mixes are playing you can actively control volume levels using the sliders. Like Authentic Sound Recorder, Authentic Sound Studio can play multiple tracks simultaneously. You create a playlist and then when playback is inititated all tracks on the playlist are played with the currently selected track.



Drag and Drop Features

Click on this icon to drag and drop tracks into the playlist, to add a track to a mix or to initiate track playback.



Use these icons to add or remove tracks from the playlist.


Add Track to Mix

Use this icon to add recorded tracks to a mix.



Edit Bar:

In Edit Mode you can use the sliders or the clocks to select the upper and lower bounds of a region of a track or mix file to edit. Once a region is selected you can use standard edit commands such as cut and paste to remove or add data, or alter the existing data. Click on the icons below the edit bar to get a description of the various modificationbs that can be made to the data.


Expand or Contract Edit Region

When a file is initially opened in Edit Mode the sliders can access the entire file. By reducing the region covered by the sliders you can increase the precision of the sliders. To reverse this process expand the region. The process stops once the full track is displyed.


Change Amplitude

Reduce or increase the amplitude of all the samples in a selected region, thus decreasing or increasing the volume of the resulting sound. Change Amplitude is a time domain editing process.


Replace with Silence

Replace the samples in a selected region with silence (amplitude=0.0). Replace with Silence is a time domain editing process.



Fade In/Fade Out

Gradually reduce the volume of a selected range to zero, or gradually raise it from zero . Fade In/Fade Out is a time domain editing processes.




A sample t seconds in the past relative to each sample in a selected region is added to the sample., thus simulating an "echo". You set the time interval and the amplitude associated with the echoed signal. Echo is a time domain editing process.




Revereration is in essense repeated echo where sound produced at each instant is added to sound samples in the future. As a result, each sample repeats (or reverberates) many times simulating the sense of sound echoing off of the various reflecting surfaces in a room. Reverb is added to a selected region either by generating a response function based on a reverberation time, or by using a recorded response function. Reverb is a frequency domain editing process. More about reverb.



Digital Filtering

Included are high, low and band pass filters. A high pass filter strongly attenuates frequencies below some threshold and "passes" those above. A low pass filter does the opposite. A band pass filter attenuates all signal outside of a given "band" of frequencies. An option in the band pass filter converts it to a notch filter where a selected frequency range is removed from the data. Filtering is a frequency domain editing process.



Noise Filtering

This option allows you to record a short background noise sample in the room you are using for recording. Authentic Sound Studio will then generate the frequency spectrum of this sample and use it to remove noise from any selected region of a sound file. Noise filtering is a frequency domain editing process.


Edit Playback

All editing is performed in a nondestructive manner using temporary files. As you edit a file you can play it back so as to actually hear the changes you've made. You can also play only the range selected with the edit bar




Mix Sequencing

Set the entrance and exit points for each track in a mix. For example, a guitar solo in the middle of a some may enter near the middle of the song and leave before the end.



Mix Control and Playback

Open the mix window where you can simulate the mix, playing the tracks together while adjusting levels, and then finally creating a single audio file which contains a superposition of all the tracks.


Time Domain Editing

Editing in this domain is performed directly on the sampled data in the sequence that it appears. That is the data remains as a time sequence. This is in contrast to frequency domain editing where the data is converted into a frequency sequence prior to editing. Generally speaking, time domain editing procedures are much faster than frequency domain processes.



Frequency Domain Editing

Editing in this domain requires two Fourier transforms (forward and inverse). Sandwiched between the two transforms is the actual editing process. For example, to execute a high pass filter, we first transform the original data (a time sequence) into a series of frequencies and their associated amplitudes (a frequency sequenc). Then we apply the filter which acts to attentuate low frequency amplitudes and pass high frequency amplitudes. This creates a transformed frequency sequence which we now transform back into a time sequence.Generally speaking editing in this manner requires more CPU time than time domain editing and as a result Authentic Sound Studio employs a batch processing approach where you have some control of the program as the editing is occuring.