Bounce Speed?

Discuss the Zoom H6, H5, H4, H4n, H2, H2n, and H1. Please don't "post and run". Participate in the discussion. Thanks.
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yop44
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Bounce Speed?

Post by yop44 » Wed May 30, 2018 3:05 am

Hi,

I love my H4N Pro, but one feature that I use a lot, is the "bounce". Unfortunately it's really slow.
With 4 mono tracks of 1 minutes, bounce takes more than 2 minutes.
I tested a couple of SD card, but a faster SD card does not decrease the bounce time.

So I'm wondering, owners of H5 and H6, how much time does mixdown/bounce take with 4 tracks of 1 minute?

I'll be very helpful to me.

:)
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still_fiddlin
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Re: Bounce Speed?

Post by still_fiddlin » Wed May 30, 2018 11:52 am

The mixdown on the H6 depends on the output format, which I suspect is the case on all of these. And, it's probably processor limited as much as anything.

Not sure if the following applies since I don't know if the H6 options are the same as yours, but here are my results - single test so I didn't re-run anything or try different files.

I just recorded about a minute, 48kHz/24-bit WAV, and mixdown to the same format was fastest, at about 0:38 (sec).

MP3 mixdown was slower with 256kbps taking 1:36 and 128kbps 1:20.

I honestly don't have any idea of the workings of the MP3 compression, but the noticeably faster speed for the lower quality surprised me, i.e., that should mean more compression, but perhaps that translates to less care/processing steps? Or maybe it was just the data size (write) that made the lower quality a little faster, though the mixdown with the largest data file (WAV) was still the fastest.
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yop44
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Re: Bounce Speed?

Post by yop44 » Thu May 31, 2018 3:41 am

Thanks for your feedback,

how many tracks (and mono / stereo ?) were present in the project for your mixdown?
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Re: Bounce Speed?

Post by still_fiddlin » Thu May 31, 2018 6:22 am

yop44 wrote:
Thu May 31, 2018 3:41 am
Thanks for your feedback,

how many tracks (and mono / stereo ?) were present in the project for your mixdown?
4 mono tracks
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yop44
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Re: Bounce Speed?

Post by yop44 » Thu May 31, 2018 8:07 am

Ok, thanks, that's also what I've got.

1min x 4 mono tracks bounce :
H6 => 0:38'
H5 => ?
H4 => 2:26'


What a difference!
I'm wondering what a H5 would give us.
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Re: Bounce Speed?

Post by still_fiddlin » Thu May 31, 2018 8:29 am

yop44 wrote:
Thu May 31, 2018 8:07 am
...
1min x 4 mono tracks bounce :
H6 => 0:38'
H5 => ?
H4 => 2:26'
...
Was your test with WAV files? I would guess bounce/mixdown of MP3 would be the worst case since the little processor would have to decode the input, mix it and then encode the output, probably using some temporary storage on the SD for all of that. But, you know there's probably going to be some differences in the processors and maybe available built-in memory between these devices, and those kinds of things will make a big difference if it's doing something not done in firmware, which is probably where the basic record/playback is.

I was looking at the H4n Pro manual and it has a 4ch->Stereo step that looks like it's doing the same thing? The H6 doesn't have something labeled as "Bounce" in the menu, just Mixdown Format and Execute, so maybe there's something different going on.
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Re: Bounce Speed?

Post by yop44 » Thu May 31, 2018 11:45 am

As far as I know, there is no bounce in 4CH mode with H4N Pro. I made the test in MTR Mode. This mode only accept 44.1kHz/16bit.
I'm surprised the H6 is 4x faster, as it's been released in 2013, and the H4N Pro has been released in 2016. But I totally understand they are not designed for the same usage.
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Re: Bounce Speed?

Post by Wulfraed » Thu Jun 07, 2018 2:45 pm

yop44 wrote:
Thu May 31, 2018 11:45 am
As far as I know, there is no bounce in 4CH mode with H4N Pro. I made the test in MTR Mode. This mode only accept 44.1kHz/16bit.
I'm surprised the H6 is 4x faster, as it's been released in 2013, and the H4N Pro has been released in 2016. But I totally understand they are not designed for the same usage.
The internal processor may not have changed -- just the UI/controls layout and firmware.
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