User manual APPLIED ACOUSTICS SYSTEMS TASSMAN

[. . . ] USER MANUAL 2 Information in this manual is subject to change without notice and does not represent a commitment on the part of Applied Acoustics Systems DVM Inc. The software described in this manual is furnished under a license agreement. The software may be used only in accordance of the terms of this license agreement. It is against the law to copy this software on any medium except as specifically allowed in the license agreement. [. . . ] As the number of modes is increased, the number of partials in the sound increases but also inevitably the calculation load. · Excitation point: x-coordinate, in meters, of bow interaction point from the extremity of the string. · Listening point: x-coordinate, in meters, of listening point from the extremity of the string. The excitation and listening points should be the same in order to obtain a proper functioning. Note: For more details on this module and especially the front panel controls, see the Bowed Multimode module. 6. 15 Breath Controller This module is used to receive signal from a MIDI breath controller (MIDI controller number 2). Its one output, the breath controller signal, lies between 0 and 1 depending on the blowing strength. This module has no front panel control. 78 Specifications for modules The default value of the following parameters is set during construction · MIDI channel: MIDI channel used by the breath controller. 6. 16 Comb The Comb filter enhances frequency components located at harmonic intervals. The frequency response of the filter is composed, as shown in Figure 29, of resonances around frequency components located at multiples of a fundamental frequency (hence its name). The effect of the filter is to color the sound with a change of apparent pitch. This module has one output, the filtered signal, and three inputs. The first input is the signal to be filtered. The second and third inputs are modulation signals used to vary the tuning (resonance frequency) of the filter. The algorithm implemented in this module sends the input signal into a variable delay line. The output of this delay is then re-injected in this delay line with a gain factor. gain depth = 0. 99 depth = 0. 5 depth = 0 f 2f 3f frequency Figure 28: Frequency response of a Comb filter Tuning The coarse and fine knobs and the range switch are used to tune the resonance frequency of the filter. The variations in resonance frequency caused by changes in the modulation signals are relative to this level. The length of the filter delay line is calculated as the inverse of the resonance frequency (a period). When the two knobs are in their center position (green LEDs on for the coarse knob), the range switch is set to 8 and there is no modulation signal, the filter resonance frequency has a value of 261. 6 Hz, which corresponds to the C3 key on a piano (middle C). The range switch transposes the resonance frequency one or two octaves up or down. The reading on the counter indicates the resonance frequency, in Hertz, of the filter. The length of the delay line 6. 16 Comb 79 can be modulated by using the modulation inputs of the module. The amount of variation of the resonance frequency obtained with the modulation inputs depends on the adjustment of the mod1 and mod2 gain knobs. The total modulation signal is the sum of the two inputs each multiplied by the gain corresponding to its respective mod knob. [. . . ] AAS retains ownership of and title to all intellectual property rights in the Software, underlying technology, related written materials, logos, names and other support materials furnished either with the Software or as a result of this Agreement, including but not limited to trade secrets, patents, trademarks and copyrights therein. Licensee shall not remove or alter any copyright or other proprietary rights notices contained on or within the Software and shall reproduce such notices on all copies thereof permitted under this Agreement or associated documentation. 164 License Agreement 4. Except for the foregoing, THE SOFTWARE IS provided "AS IS" without warranty or condition of any kind. AAS disclaims all warranties or conditions, written or oral, statutory, express or implied, including but not limited to the implied warranties of merchantable quality or fitness for a particular purpose, title and non-infringement of rights of any other person. [. . . ]