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+  Rockbox Technical Forums
|-+  Support and General Use
| |-+  Recording
| | |-+  Recording via optical-in
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Author Topic: Recording via optical-in  (Read 56167 times)

Offline manno

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Re: Recording via optical-in
« Reply #75 on: April 26, 2006, 12:51:00 PM »
Quote from: pabouk on April 26, 2006, 12:24:20 PM
Quote from: manno on April 26, 2006, 11:36:41 AM
I checked all my setting and made sure that it was being sent a 48khz signal and it is but still downsampling to 44.1khz no matter what I do. Isn't it hardcoded into the patch to only do 44.1 at this time?
Is not the resulting wav in fact 48 kHz PCM data with just a 44.1 header?
Is not the recored wav time length about 9% bigger and does not the sound have a lower pitch?


I'm not sure but I do know that the picth is lower hence incorrect sampling information. What is the easiest way to edit the header only without resampling? I use Audition.

Update- I used "Adjust sample rate" in audition and set it to 48khz. It looked like it only changed the header instead of resampling. The resulting file is now at 48khz and it sounds perfect.
« Last Edit: April 26, 2006, 01:01:39 PM by manno »
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Offline preglow

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Re: Recording via optical-in
« Reply #76 on: April 26, 2006, 08:16:14 PM »
The SPDIF recording patch never downsamples the data it gets. However, it's very possible that an incorrect WAV header gets written. This can be fixed losslessly. The sample rate that gets written to the WAV is the sample rate the signal has got at the moment you press the record key. There  are probably some bugs as well. I'll fix when I have time and am somewhat less tired of working on it.
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Offline manno

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Re: Recording via optical-in
« Reply #77 on: April 26, 2006, 11:30:55 PM »
Quote from: preglow on April 26, 2006, 08:16:14 PM
The SPDIF recording patch never downsamples the data it gets. However, it's very possible that an incorrect WAV header gets written. This can be fixed losslessly. The sample rate that gets written to the WAV is the sample rate the signal has got at the moment you press the record key. There  are probably some bugs as well. I'll fix when I have time and am somewhat less tired of working on it.

Thanks for all the hard work and effort that you have put into this!
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Offline groovetube66

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Re: Recording via optical-in
« Reply #78 on: April 28, 2006, 04:10:25 PM »
What type of cable do I need to send an digital signal into the iRiver?  It looks like a standard 3.5mm but that can't be right, is it?  My digital source is a toslink out.  So is there a toslink to 3.5mm cable.  Is that 3.5mm spdif?
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Offline pilot000

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Re: Recording via optical-in
« Reply #79 on: April 28, 2006, 04:19:42 PM »
Picture is here:

http://www.funk-tonstudiotechnik.de/Lichtleiter-Toslink-Klinke-5.jpg

search for "toslink 3,5"
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Offline groovetube66

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Re: Recording via optical-in
« Reply #80 on: April 28, 2006, 04:22:07 PM »
Thank you!
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Offline whatboutbob

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Re: Recording via optical-in
« Reply #81 on: April 28, 2006, 07:39:07 PM »
I ran optical in the wild for the first time on Thursday night (Rodrigo y Gabriela for the Irish among us). It all went without a hitch.
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Offline hellokitty

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Re: Recording via optical-in
« Reply #82 on: April 30, 2006, 02:44:11 PM »
Hi,

now it's me who is not gonna let this thread die !

From the IRC:

02.13.21 #       <preglow> this reminds me i need to finish spdif recording before i just abandon it

<whatboutbob> preglow: have you had another crack at optical, or have you given up in exasperation?

  <preglow> whatboutbob: haven't had time



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Offline dwonk

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Re: Recording via optical-in
« Reply #83 on: May 02, 2006, 12:29:32 AM »
Can we all chip in and get preglow a fruit basket?  He has come this far, let's help him finish it!
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Offline whatboutbob

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Re: Recording via optical-in
« Reply #84 on: May 02, 2006, 12:44:01 AM »
If it were me I'd prefer a carton of beer. ;-)

I've already committed to making another rockbox donation once optical recording is done. *fingers crossed*

He was having another go at it yesterday:

15.22.26 #       * preglow has a final (he hopes) stab at spdif recording

...but no update thereafter, so don't get your hopes up.
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Offline MoAv

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Re: Recording via optical-in
« Reply #85 on: May 02, 2006, 04:19:22 AM »
What's wrong with the patch ? the recording works perfect for me .
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Offline whatboutbob

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Re: Recording via optical-in
« Reply #86 on: May 02, 2006, 05:35:36 AM »
moav: Recordings sporadically fail in a way that's difficult to reproduce reliably. Also if the signal fails the recording hangs rather than ending gracefully, forcing a reset.
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Offline ItsJustMe

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Re: Recording via optical-in
« Reply #87 on: May 02, 2006, 11:24:41 AM »
Hello all!  :D

I'm new to this forum. I just bought an iHP-140 on Ebay (I should have done this years ago, but no money :'() and wanted to let you know that I will donate 25€ the day optical-in recording works flawlessly. And I hope I will not be the only one.

So please keep up the good work! (I already registered at Paypal  ;))
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Offline dunno

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  • if it moves, bite
Re: Recording via optical-in
« Reply #88 on: May 02, 2006, 12:27:06 PM »
Quote from: ItsJustMe on May 02, 2006, 11:24:41 AM
and wanted to let you know that I will donate 25€ the day optical-in recording works flawlessly. And I hope I will not be the only one.

So please keep up the good work! (I already registered at Paypal  ;))

Conratulations on your new player, and may you have many mp3 hours with it. I love my two h140's.

I just think that your statement above is a bit tactless and undiplomatic, you're implying that the teams effort to date isn't worth anything, and you only find optical recording to be of value. Lots of man hours hae gone into rockbox which is comprised of lots of line of code, It isn't just optical recording which has value.
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Offline Davide-NYC

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Re: Recording via optical-in
« Reply #89 on: May 02, 2006, 05:38:58 PM »
Not to pile on the crap, but I agree with Dunno.
I just held an auction for a bunch of iHP-140 parts, donated $200 to ROCKbox and "suggested" that they get the optical done.

It was not ransom, it was just a suggestion. See? Open source, voluntary, all that hippie jazz. Dig?
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