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Why can't I get a natural volume swell with the Exp. Pedal?

Normal volume pedals use an audio taper to create a logarithmic output level given a linear input. In other words, as you move smoothly from heel to toe position, the actual output increases at a higher rate during the beginning of the movement than the end. This corresponds to how humans perceive volume differences.

In contrast, the Pod's expression pedal follows a linear path, which makes it appear to exponentially increase in volume as the pedal is moved smoothly from heel to toe. For a smoother volume swell, bug Line 6 to offer alternative curves for the expression pedal to follow or for the volume pedal effect to behave like a normal volume pedal via the feature request form.

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How do I use the Pitch Glide?

This is designed to simulate the DigiTech Whammy pedal. It can go from -2 octaves to +2 octaves, and you can set the mix of the pitch shifted tone with the bypass tone. The pitch shift parameter is measured in half steps. 12 half steps = 1 octave. 7 half steps = 1 perfect fifth.

I believe the default settings do not use the exp pedal. You have to go to the controllers tab/page, and assign EXP-1 or EXP-2 to control the Pitch Glide's Pitch parameter. This is where things get confusing. You want the minimum and maximum to control the amount of pitch shift you get when going from heel to toe position. If you set min to 25% and max to 50%, this means it will go from -1 octave to unison. So 0% is -2 octaves, 75% is +1 octave, and 100% is +2 octaves. You can set min and max to go the other way, for instance setting min to 50% and max to 25%, so that as you move from heel to toe, the pitch shifts downward an octave.

Unfortunately, percentages do not match perfectly to half steps. There are 101 percentage values available but 481 pitch values available. Since these numbers do not divide evenly into each other, it is impossible to set the percentages to be perfect intervals, other than the octaves just mentioned. For example, to get a perfect fifth up, you would have to set the percent to 64.58333%, which is not available.

If you want this functionality, please bug Line 6 via their product feedback form.

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IV. Compatibility/Hardware Does the Pod hd work with Gearbox?

No, the Pod HD will only interface with the appropriate HD Edit software, given your HD model.

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Can I use hd-XXX patches on hd-yyy?

There are 5 different models of the Pod HD (300/400/500/Desktop/Pro). Each model uses a different patch format (.h3e, .h4e, .h5e, .hbe, .hre). From my limited testing, the more recent versions of the HD Edit software will sometimes convert these patches automatically where there is no potential conflict. For example, I can drag a .hbe file into HD 500 Edit, and it will usually load without a problem.

However, in many cases, the HD Edit software will give an error message about invalid patch data and set the entire patch to a blank patch. The different products have different feature sets that may not 100% translate between units. For instance, the 300 and Desktop do not have an effects loop. The 300/400 use a different signal chain layout than the other units. The 300 does not have effects that are available in the other units. Even where feature sets (related to the patch) are identical, HD Edit may not automatically convert them. For instance, I can't load .hre (Pro) patches into HD 500 Edit.

Ideally, the software should translate what it can, and drop the rest from the patch, and where features are dropped or compromised, the user gets a warning that the patch had to be altered during translation (possibly even saying what was dropped). Bug Line 6 to incorporate such features via the feature request form.

Jzab has made a nice conversion program to translate patches from the 500/Pro/Desktop formats to 300/400. I'm sure this involves dropping some features from the source patches, as the 300/400 architecture is much more limited than the others, but it's better than nothing. Check it out here: http://www.jzab.de/content/pod-hd.

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