Home › Forums › Products › Stompboxes › Latency doubles when H9 is used in Pre / Post routing mode.
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March 6, 2017 at 1:28 pm #114046
workingtitle
ParticipantUnfortunately, latency doubles in pre / post mode although only one algorithm is active.
Can this be fixed in a software update? I use an H9 in pre/post mode and a second in normal routing mode. Unfortunately, the total latency (when both are on) is becoming unpleasantly high.
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March 6, 2017 at 1:49 pm #145878
Unfortunately it's the hardware – any latency is in the analog conversion, and if the signal goes through the unit twice (as it does in pre/post) you will get double the latency.
Is there anything you can do with KILLDRY to help ?
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April 17, 2017 at 9:10 pm #146183
mistercharlie
ParticipantJust to be clear, the signal gets an AD/DA conversion twice in pre/post mode, even though I’m only using either the pre or the post routing? It doesn’t just ignore the unused in/out?
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April 18, 2017 at 12:52 pm #146189
workingtitle
Participantmistercharlie wrote:Just to be clear, the signal gets an AD/DA conversion twice in pre/post mode, even though I’m only using either the pre or the post routing? It doesn’t just ignore the unused in/out?I’m pretty sure the signal is converted twice. The latency is twice as high in the pre/post mode.
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April 18, 2017 at 2:28 pm #146191
To confirm – Pre/Post is a dsp feature added after the unit was designed – there is no special hardware to perform the routing.
As a result, both inputs have to go into the signal processor to be routed, meaning each one has to go through the A/D and D/A.
If the signal were to be ignored, it would not appear at the appropriate output.
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April 18, 2017 at 3:32 pm #146193
alexone
ParticipantUnfortunately, the design of the H9 has not be thought with true bypass in mind.
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April 19, 2017 at 12:06 pm #146199
workingtitle
ParticipantI have my H9 in now in the first and last loop of my Musicom Lab EFX LITE 62M. This solves the problem for me.
Is the True Bypass Relay in the H9 only capable of switching both inputs and outputs at the same time?
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April 19, 2017 at 3:43 pm #146201workingtitle wrote:
Is the True Bypass Relay in the H9 only capable of switching both inputs and outputs at the same time?
It is – it bypasses the whole unit – that's what it is for.
Actually there are two bypass relays – one switches inputs and the other switches outputs – this is done so that one can precede the other and avoid clicks. This stuff is not simple.
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April 26, 2017 at 2:18 pm #146240
Wallower
MemberNot holding my breath, but I’d gladly give you guys more money to mod my H9 with additional relays so that the signal only goes through one stage of A/D D/A conversion in Pre/Post mode.
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