Yamaha Tyros4 Reference Manual - Page 13

Voices - Playing the Keyboard - 2 AFTER TOUCH Aftertouch can be used to modulate the parameters below. Here, you can set the degree to which Aftertouch modulates each of the following parameters. [2 ] FILTER Determines the degree to which Aftertouch modulates the Filter Cutoff Frequency. See below for details about Filter. [3 ] AMPLITUDE Determines the degree to which Aftertouch modulates the amplitude (volume). [5 ] LFO PMOD Determines the degree to which Aftertouch modulates the pitch, or the vibrato effect. [6 ] LFO FMOD Determines the degree to which Aftertouch modulates the Filter modulation, or the wah effect. [7 ] LFO AMOD Determines the degree to which Aftertouch modulates the amplitude, or the tremolo 1 effect.  SOUND Page FILTER Filter is a processor that changes the timbre or tone of a sound by either blocking or passing a specific frequency range. The parameters below determine the overall timbre of the sound by boosting or cutting a certain frequency range. In addition to making the sound either brighter or mellower, Filter can be used to produce electronic, synthesizer-like effects. [1 ] BRIGHT (Brightness) Determines the cutoff frequency or effective frequency range of the filter (see diagram). Higher values result in a brighter sound. Volume Cutoff Frequency [2 ] HARMO. (Harmonic content) Determines the emphasis given to the cutoff frequency (resonance), set in BRIGHT above (see diagram). Higher values result in a more pronounced effect. These frequencies are Cutoff "passed" by the filter. range Volume Frequency (pitch) Resonance Frequency (pitch) EG The EG (Envelope Generator) settings determine how the level of the sound changes in time. This lets you reproduce many sound characteristics of natural acoustic instruments-such as the quick attack and decay of percussion sounds, or the long release of a sustained piano tone. Level ATTACK DECAY Sustain Level RELEASE Time Key on Key off [3 ] [4 ] [5 ] ATTACK DECAY RELES. (Release) Determines how quickly the sound reaches its maximum level after the key is played. The lower the value, the quicker the attack. Determines how quickly the sound reaches its sustain level (a slightly lower level than maximum). The lower the value, the quicker the decay. Determines how quickly the sound decays to silence after the key is released. The lower the value, the quicker the decay. Tyros4 Reference Manual 13