Audio Tool Box Docs

Mac Audio Toolbox Version 1.8.0 October 30, 2005 Mac Audio Toolbox is an audio function generator for the Macintosh. Using no additional hardware, you can produce sine, square, triangle, and sawtooth waveforms of any frequency up to 22 kHz, as well as generate noise. In addition, there is a sweep generator. In addition, the Mac OS X version features oscilloscope and spectrum displays. The purchase price is only $19.99. You can generate up to 13 different waveforms. Each waveform can be routed to either the left or right channel, or to both. The amplitude of each waveform may be adjusted, as well as the volume on each channel, which is a mix of any waveforms routed to that channel. Please be sure to read this document before using the program, you will probably find the answers to any questions you may have. If you still have a question, feel free to contact us at support@blackcatsystems.com Function Generator When the program starts up, you'll see two windows. One window is similar to the following, it's the function generator window: Let's take a look at the various controls and features: For each waveform, there are six controls: Enabled If this is checked, the waveform is enabled for generation. Typing control-command-0 through 9, A, B, C will turn a generator on or off when this window is selected. Type This popup menu selects the type of waveform to be generated Freq This is a text box into which you type the desired waveform frequency, in hertz (Hz). Left When checked, this waveform is routed to the left channel. Right When checked, this waveform is routed to the right channel. Amplitude This is a text box into which you type the desired amplitude of the waveform, ranging from 0 (off) to 100 (maximum). In addition, there are two sliders, one each for the left and right channels. They adjust the output volume for each channel. There is also a bar graph volume display for each channel. Note that the volume display is only affected by the various waveforms fed to that channel, not by the volume slider for that channel, since that volume adjustment is applied after the Mac's D/A output. As you add more waveform to a channel, the overall gain of that channel is automatically adjusted, to prevent clipping. Please note that due to the limited bandwidth of the Mac's audio output, square and sawtooth waveforms will show significant overshoot. This is a function of the Mac's hardware, and cannot be overcome by software. You can Save your current settings, and restore them later, by using the Save and Open selections under the File menu. Sweep Generator The second window is the sweep generator: The Enabled, Left, and Right controls and the Amplitude work just as with the function generator window. The Start and End values are the two frequencies between which the generator will sweep. The Rate is the sweep rate, in Hz per second. By selecting Reverse, the sweep generator will sweep the frequency back t…