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Author Topic: Resampling Question  (Read 1829 times)

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Offline blu666z

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Resampling Question
« on: September 02, 2003, 04:10:55 PM »
What Interpolation Accuracy should I use?  SoundForge has 1-4.  4 being the highest.

Also, why when I resample from 48 to 44.1 does it change the overall length of the clip?

-Kevin
« Last Edit: September 02, 2003, 04:24:21 PM by blu666z »

Offline F.O.Bean

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Re:Resampling Question
« Reply #1 on: September 02, 2003, 04:27:26 PM »
What Interpolation Accuracy should I use?  SoundForge has 1-4.  4 being the highest.

Also, why when I resample from 48 to 44.1 does it change the overall length of the clip?

-Kevin

not sure about sf question, prolly the highest, im guessing, but as to the latter, yes, it changes the size ever so slightly... 8)
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Offline dmonterisi

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Re:Resampling Question
« Reply #2 on: September 02, 2003, 04:32:06 PM »
is it changing the length of the clip or the size of the file?  i don't understand why it would change the length of the clip (other than possibly by milliseconds).

Offline F.O.Bean

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Re:Resampling Question
« Reply #3 on: September 02, 2003, 04:43:01 PM »
is it changing the length of the clip or the size of the file?  i don't understand why it would change the length of the clip (other than possibly by milliseconds).

wouldnt these be the same thing, technically??? if your wholr file is highlited, would that be a clip??? ???
Recording Rigs:
Schoeps MK4's & MK41's ->
Schoeps | NBob 250/0 KCY's ->
Naiant +60v/Low Noise PFA's ->
DarkTrain Right Angle Stubby XLR's ->
Sound Devices MixPre-6 & MixPre-3 ->
SanDisk 128gb Extreme Pro & 2x 64gb Ultra Plus

Portable Playback Rigs:
Campfire Audio Andromeda & Dorado | Westone (2nd Generation) UM Pro 30 IEM's ->
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Offline dmonterisi

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Re:Resampling Question
« Reply #4 on: September 02, 2003, 04:56:21 PM »
i don't think i said what i meant very well...I was trying to ask whether he was saying that the file is shorter in lenght (before resampling it was 3mins, 30 secs and after it was 3 mins, 27 secs) or that the file size was smaller after resampling.

I wouldn't think that the first choice would happen, but i don't know if i've ever actually compared the files in that way after resampling.  the size of the file on your hard drive should definitely be smaller than the original file.

Offline F.O.Bean

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Re:Resampling Question
« Reply #5 on: September 02, 2003, 04:59:09 PM »
i don't think i said what i meant very well...I was trying to ask whether he was saying that the file is shorter in lenght (before resampling it was 3mins, 30 secs and after it was 3 mins, 27 secs) or that the file size was smaller after resampling.

I wouldn't think that the first choice would happen, but i don't know if i've ever actually compared the files in that way after resampling.  the size of the file on your hard drive should definitely be smaller than the original file.

i pheel ya, real time wouldnt be diff.....only file size, but i could be wrong 8)
Recording Rigs:
Schoeps MK4's & MK41's ->
Schoeps | NBob 250/0 KCY's ->
Naiant +60v/Low Noise PFA's ->
DarkTrain Right Angle Stubby XLR's ->
Sound Devices MixPre-6 & MixPre-3 ->
SanDisk 128gb Extreme Pro & 2x 64gb Ultra Plus

Portable Playback Rigs:
Campfire Audio Andromeda & Dorado | Westone (2nd Generation) UM Pro 30 IEM's ->
Linum G2 SuperBax & Bax |  2x CA/ALO SPC Litz | Sony MUC-M2BT1 LDAC MMCX Cables ->
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Offline blu666z

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Re:Resampling Question
« Reply #6 on: September 02, 2003, 05:31:37 PM »
The size I'm sure changed but I am talking about the length of the clip.  Don't have exact numbers, but it dropped by several seconds on a 1.5 hour show.

-Kevin

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Re:Resampling Question
« Reply #7 on: September 02, 2003, 06:21:25 PM »
The size I'm sure changed but I am talking about the length of the clip.  Don't have exact numbers, but it dropped by several seconds on a 1.5 hour show.

-Kevin

that soundz abour right.....should be all good 8)
Recording Rigs:
Schoeps MK4's & MK41's ->
Schoeps | NBob 250/0 KCY's ->
Naiant +60v/Low Noise PFA's ->
DarkTrain Right Angle Stubby XLR's ->
Sound Devices MixPre-6 & MixPre-3 ->
SanDisk 128gb Extreme Pro & 2x 64gb Ultra Plus

Portable Playback Rigs:
Campfire Audio Andromeda & Dorado | Westone (2nd Generation) UM Pro 30 IEM's ->
Linum G2 SuperBax & Bax |  2x CA/ALO SPC Litz | Sony MUC-M2BT1 LDAC MMCX Cables ->
Shanling M5s & M0 | Sony NW-A35 DAP's

DAW:
Dell Inspiron 5570-5521 SLV Laptop
(Pentium i5 Processor/8gb RAM/256gb SSD)

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Offline dklein

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Re:Resampling Question
« Reply #8 on: September 03, 2003, 01:11:11 PM »
The duration of the clip shouldn't change (of course the size must) but I suppose a second or two drift could occur on 1.5 hours.  Probably depends on the software's accuracy.

You're asking it to take 259 million samples and convert the same sound into 238 million samples.  Must take a few decimal places of accuracy to get that one right!
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Offline herrmann2burn

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Re:Resampling Question
« Reply #9 on: September 03, 2003, 05:37:11 PM »
I record in 24/48 and then resample and Bit dither down to 16/44, but i use CD Wave Editor to Track out each, using the same exact Cue Sheet to put the trackmarks in.  I just compared a 24/48 and 16/44 of the same show(Untracked, so its the whole file)in CD Wave, and the are exactly the same in Length(time) up to the hundreth of a second.

I also use SF for my Resampling and Bit Dithering.
You want to have the Resample set to 4 (high), and also check the box to Apply the Anti-Alias filter during resample.
DO NOT check the other box for Set the Sample Rate Only.

Hope this helps.
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Offline blu666z

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Re:Resampling Question
« Reply #10 on: September 03, 2003, 07:59:25 PM »
I used the Anti-Alias but had the accuracy at 2(default).  I'll try 4 and see if the length comes out closer.  Wonder how much that will add to my resample time?

-Kevin

Offline F.O.Bean

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Re:Resampling Question
« Reply #11 on: September 03, 2003, 08:21:56 PM »
I used the Anti-Alias but had the accuracy at 2(default).  I'll try 4 and see if the length comes out closer.  Wonder how much that will add to my resample time?

-Kevin

never thought of that, moving to 4 def might do it.... 8)
Recording Rigs:
Schoeps MK4's & MK41's ->
Schoeps | NBob 250/0 KCY's ->
Naiant +60v/Low Noise PFA's ->
DarkTrain Right Angle Stubby XLR's ->
Sound Devices MixPre-6 & MixPre-3 ->
SanDisk 128gb Extreme Pro & 2x 64gb Ultra Plus

Portable Playback Rigs:
Campfire Audio Andromeda & Dorado | Westone (2nd Generation) UM Pro 30 IEM's ->
Linum G2 SuperBax & Bax |  2x CA/ALO SPC Litz | Sony MUC-M2BT1 LDAC MMCX Cables ->
Shanling M5s & M0 | Sony NW-A35 DAP's

DAW:
Dell Inspiron 5570-5521 SLV Laptop
(Pentium i5 Processor/8gb RAM/256gb SSD)

http://www.archive.org/bookmarks/diskobean | http://www.archive.org/bookmarks/Bean420 | http://bt.etree.org/mytorrents.php

 

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