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Chapter 7 Stereo Crossed-feedback delay
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September 15, 2015
2:25 am
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Msaldaña
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Hello,

I dont hear any difference between the NORM and CROSS option. The point is to hear the sound from the left echoes in the right speaker right?
I used Will's book projects to comfirm and hear no difference between the two options(norm and cross)
Embarassed

September 15, 2015
4:36 am
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W Pirkle
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Yes, this is a difficult one to hear - I should have done the ping-pong delay instead, in hindsight.

To hear this one, you need a WAV file that has material in one channel, then the other. I used a WAV file that had single snare hits in the left channel, then some silence, then hits in the right channel. You need that silent gap to hear the feedback crossing back and forth. This algorithm came from the Korg Wavestation; I think maybe synth patches (or arpeggiated things) work better with that one. If you have the Synth book, the last chapter is a set of delay FX including ping pong and a couple of multitap delays that bounce stuff back and forth between the speakers really nicely.

You can also use the ping-pong block diagram in the FX book, but you need to make the L and R delays have different lengths to hear the effect - other wise, it's difficult to hear. You can also try this on the cross-delay; let the user adjust a ratio control that sets the L and R delays as multiples of one another.

- Will

September 15, 2015
10:15 am
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Msaldaña
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Hey Will,

I just tried what you just described with no luck.
The snare(left) are still echoing on the left and I'm using the project that you provided "AudioEffectBookProjects.6.0.1".

Thank you very much!

September 23, 2015
11:42 pm
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Niro
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September 23, 2015
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Hi Msaldaña,
Until now I thought that I had the same issue.
I've found out that crossing involves only feedback branch. So if you can listen this effect you must set feedback different from 0%.
I hope this can help you

September 25, 2015
1:08 am
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Msaldaña
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mmm so what you mean is to change the feedback value in order to listen to the echoes? yes that's the idea,but I don't listen the sounds panning from left speaker to right speaker or viceversa...Confused

thanks!

September 25, 2015
10:53 am
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Niro
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I apologize for not being word-perfect in English. English isn't my native language.
I mean, if I set feedback to 0% there is only one delayed signal. This signal is in the same channel as original.
But if I set feedback different from 0% there are many delayed signals - echoes. These signals sound panning from left to right when type is set to CROSS.

September 25, 2015
11:31 pm
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Msaldaña
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You're right that's the effect that I'm trying to hear, maybe i'm doing something wrong in the code.Surprised

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