Reso’s Low Pass Filter is a single resonant filter that is applied to all of Reso’s voices.
The Frequency control sets the cutoff frequency of the Low Pass Filter in Hertz. All frequencies above the selected cutoff frequency will be attenuated.
The range of this control is from 20 Hz to 20 kHz.
Sometimes referred to as resonance on synthesizers, Q adjusts the height of the resonant peak that occurs at the filter’s cutoff frequency.
Increasing the Q increases the volume of frequencies near the filter’s cutoff frequency (suppressing the more remote frequencies) and adds a nasal quality to the audio. High Q settings let you create wah-wah type effects, particularly when the filter is swept with the Follower.
The Follower is an envelope follower that lets the filter cutoff frequency dynamically follow the amplitude of the source audio signal.
The range of this control is from a low of –10 to a high of +10. With positive values, the louder the source audio, the higher the cutoff frequency and the wider the filter will open for a brighter sound. With negative values, the louder the source audio, the lower the cutoff frequency and the more the filter will close for a duller sound.
The effectiveness of the Follower depends on the filter’s Frequency setting. For example, setting the Follower to +10 and selecting a low Frequency setting will sweep the filter wide on loud passages. However, if the cutoff frequency is at its maximum, setting the Follower to +10 will not sweep the filter at all since it is already completely open.
When used with high Q settings and a relatively low cutoff frequency, the Follower can be used to produce an automatic wah-wah-type effect.
In this mode, Reso responds monophonically, producing a single note even if more than one is played simultaneously (though multiple voices can be stacked on the same note using the Voice Stacking control). Monophonic mode gives voice priority to the most recently played note.
In this mode, Reso responds polyphonically, producing as many notes as are played simultaneously (up to 62 on Pro Tools|HD Accel systems). The number of notes that can be played simultaneously depends on the Voice Stacking setting chosen. A voice stack setting of 1, for example, allows up to 62 individual notes simultaneously. A voice stack setting of All allows only one note at a time, but will stack all 62 voices on that note, producing an extremely fat sound.
Voice Stack selects the number of voices that are used, or stacked when you play a single note. The number of voices that you choose to stack will directly affect polyphony. Selecting a larger number of stacked voices will reduce the number of notes that you can play simultaneously. The sample rate of your session will also affect polyphony.
In a 96 kHz session, Reso on Pro Tools|HD Accel systems can simultaneously play up to:
In a 44.1 kHz or 48 kHz session on Pro Tools|HD systems not equipped with an HD Accel card, the standard Reso module can simultaneously play up to:
If all available voices are being used, playing an additional note will replace the first note played in the chord.