SevenDelay

SevenDelay is a stereo delay with 7th order lagrange interpolated fractional delay and 7x oversampling.

Controls

Knob and slider can do:

• Ctrl + Left Click: Reset value.
• Shift + Left Drag: Fine adjustment.

Caution

When the value of Smooth is near zero and change the value of Allpass Cut too fast, SevenDelay may output very loud click noise. This is caused by the filter which becomes unstable when cutoff frequency moves too fast. Recommendation is not to set Smooth parameter too low unless you have some specific purpose.

When the value of Time is set to minimum and the value of Feedback is set to maximum, SevenDelay outputs direct current (DC). To remove DC, Set DC Kill to be greater than 1.0.

Parameters

Delay

Time

Delay time. Range is 0.0001 to 8.0.

• If Sync is on and Time is less than 1.0, then delay time is set to Time / 16 beats.
• If Sync is on and Time is greater or equal to 1.0, then delay time is set to floor(2 * Time) / 32 beats.
• Otherwise, delay time is set to Time seconds.

Feedback

Delay feedback. Range is 0.0 to 1.0.

Stereo

L/R stereo offset. Range is -1.0 to 1.0.

• If Stereo is less than 0.0, then left channel delay time is modified to timeL * (1.0 + Stereo).
• Otherwise, right channel delay time is modified to timeR * (1.0 + Stereo).

Wet

Output volume of delayed signal. Range is 0.0 to 1.0.

Dry

Output volume of input signal. Range is 0.0 to 1.0.

Sync

Toggle tempo sync.

Negative

Toggle negative feedback. This may be useful when delay time is very short.

InS/InP and OutS/OutP

Input spread, input pan, output spread and output pan. Range is 0.0 to 1.0.

In/Out Spread controls stereo spread. In/Out Pan controls stereo panning. (* means wildcard. In this case, In or Out.)

These parameter can be used for inverse panning, ping-pong delay etc.

• For inverse panning, set [InSpread, InPan, OutSpread, OutPan] to [0.0, 0.5, 1.0, 0.5].
• For ping-pong delay, set [InSpread, InPan, OutSpread, OutPan] to [1.0, 0.5, 0.0, 0.5].

panL = clamp(2 * pan + spread - 1.0, 0.0, 1.0)
panR = clamp(2 * pan - spread, 0.0, 1.0)

signalL = incomingL + panL * (incomingR - incomingL)
signalR = incomingL + panR * (incomingR - incomingL)

Allpass Cut

SFV allpass filter frequency. Range is 90.0 to 20000.0.

If Allpass Cut is 20000.0, filter will be bypassed.

Allpass Q

SFV allpass filter resonance. Range is 0.00001 to 1.0.

DC Kill

Cutoff frequency of biquad highpass filter. Range is 1.0 to 120.0.

DC Kill removes direct current from delay feedback when the value is set to be greater than 1.0.

Smooth

Parameter smoothing. Range is 0.0 to 1.0. Unit is seconds.

Some parameter may produce noise when the value is changed too fast. Increasing Smooth reduces those noise.

LFO

To Time

LFO modulation amount to delay time. Range is 0.0 to 1.0.

To Allpass

LFO modulation amount to allpass cutoff frequency. Range is 0.0 to 1.0.

Freq

LFO frequency. Range is 0.01 to 100.0.

Shape

LFO waveform shape. Range is 0.01 to 10.0.

sign = 1 if (phase > π),
      -1 if (phase < π),
       0 if (phase == π)
lfo = sign * abs(sin(phase))^shape

Phase

LFO initial phase. Range is 0.0 to 2π.

LFO phase is reset to Phase for each time host starts playing.

Hold

Toggle LFO phase hold. This may be useful for live performance.

License

SevenDelay is licensed under GPLv3. Complete licenses are linked below.

• https://github.com/ryukau/VSTPlugins/tree/master/License

If the link above doesn’t work, please send email to ryukau@gmail.com.

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