|
Aitch
|
 |
« on: 10:18:21, 12-12-2007 » |
|
OK.
I have a Sony DVD recorder, which has a built-in Freeview receiver. So I can record from Radio onto DVD.
My question is, as the recorder has several levels of recording quality, which level do I need to record at? If I record at the lowest, does it affect the sound, or only the picture? I know that the image does look better at higher quality settings, but the audio track seems about the same.
Anybody know?
|
|
|
|
|
Logged
|
|
|
|
|
Bryn
|
|
« Reply #1 on: 10:29:02, 12-12-2007 » |
|
I don't know the specific situation with the Sony, but on the Panasonic DVD recorders I have used, only the 1 Hour per DVD option preserves the full audio quality received, and even then, only if the LPCM audio option is selected in the setup menu. All lower speeds trandcode the mp2 stream to a different lossy codec. Whether the loss of quality inherent in such transcoding will be enough to lead you into recording everything at the highest quality, is for your ears to determine. Why not do a test by recording both the lunchtime transmission of Composr of the Week at the 1 Hour rate, and then the evening repeat at the long play rate, then listen to the playback of each?
|
|
|
|
|
Logged
|
|
|
|
|
Aitch
|
|
« Reply #2 on: 14:33:23, 13-12-2007 » |
|
The comparison sounds like a good idea - allowing for my aged ears  Mind you, checked the instruction book (having lost the original and downloaded a PDF version from Sony) and it states: Video recording format: MPEG video Audio recording format/applicable bit rate: Dolby Digital 2 ch/256 kbps which suggests a fixed audio bit rate - well it actually lists such whereas non is mentioned for video. Mind you (again) it does state applicable, which is nicely ambiguous. Think I may be forced to contact Sony and see what they say. |
|
|
|
|
Logged
|
|
|
|
|
IgnorantRockFan
|
|
« Reply #3 on: 14:58:49, 13-12-2007 » |
|
I have a related question: I can also record radio to DVD, but it would be a lot more convenient to have it on CD instead.
Does anybody know how to extract the sound from a DVD and write it to a CD? I can write music CDs with my computer but I don't know how to get the DVD sound off in the right format for a CD.
|
|
|
|
|
Logged
|
Allegro, ma non tanto
|
|
|
|
David_Underdown
|
|
« Reply #4 on: 15:57:45, 13-12-2007 » |
|
Many (all?) DVD writers can also write to CDs, it may simply be a matter of putting a CD in in the first place, rather than a DVD.
|
|
|
|
|
Logged
|
--
David
|
|
|
|
Ron Dough
|
|
« Reply #5 on: 16:12:13, 13-12-2007 » |
|
He'll need to separate the soundtrack first, David, and then convert it to a standard which will suit a CD player. Maybe start here, IRF. |
|
|
|
|
Logged
|
|
|
|
|
IgnorantRockFan
|
|
« Reply #6 on: 17:19:41, 13-12-2007 » |
|
That looks like exactly what I need, Mr Dough, thank you.
David -- yours would be the ideal solution but unfortunately my DVD recorder won't write CDs. It's a combined hard disk / DVD / Freeview box and recording music with it isn't something I ever thought about needing when I got it :-(
|
|
|
|
|
Logged
|
Allegro, ma non tanto
|
|
|
|
Ron Dough
|
|
« Reply #7 on: 17:54:51, 13-12-2007 » |
|
IRF,
It might be worth waiting until Bryn's logged on: that looks more up his street than mine.
I tend to use FM straight into my hard drives, with a timer where necessary, and record at CD quality (16/44.1). Something approaching seven hours' worth of music can be backed up onto a DVD: anything important or earmarked for others can then be edited down and burnt to CD. Occasionally I use my HDD recorder for something off satellite radio as well, but up until now I've left the material as it is, because my Mac is used in conjunction with an EyeTV box, which takes satellite radio as it is, without picture, and stores it at the received standard, so that something like 45 hours can be stored on one DVD.
|
|
|
|
|
Logged
|
|
|
|
|
Aitch
|
|
« Reply #8 on: 13:18:05, 20-02-2008 » |
|
Well, I wrote to Sony. It appears that, yes, the audio bitrate does decrease along with the video rate. Couldn't get any figures for how much it decreases out of them though. Anyway, thought I'd try it out on last weeks Discovering Music on electronic music (is that covered on another thread, BTW? I found it a tad disappointing). So set it up at the 90m per disk setting and started recording. Or so I thought. Turns out I'd cocked things up and it was at the 2h30m setting!  Oh, well, sounds OK to me; 54 years old, always lived in an urban environment and been to too many rock concerts - nowt wrong with my hearing  . (edited for punctuation) |
|
|
|
« Last Edit: 13:39:32, 20-02-2008 by Aitch »
|
Logged
|
|
|
|
|
Il Grande Inquisitor
|
|
« Reply #9 on: 18:08:54, 06-04-2008 » |
|
He'll need to separate the soundtrack first, David, and then convert it to a standard which will suit a CD player. Maybe start here, IRF.
I've had a most productive day! Finally, after months of promising myself that I'd find out how to convert some of my DVDs recorded from Radio 3 satellite to mp3, I've got round to some investigations. I knew I could count on finding some info here at r3ok! I have downloaded and tested out a DVD Audio Ripper and now have the performance of Traviata I attended in January ripped to my iPod. I'm also slightly surprised to find that normal DVDs can be audio-ripped too! |
|
|
|
|
Logged
|
Our chief weapon is surprise...surprise and fear...fear and surprise.... Our two weapons are fear and surprise...and ruthless efficiency
|
|
|
|
Bryn
|
|
« Reply #10 on: 18:24:22, 06-04-2008 » |
|
IGI, which DVD audio ripper did you use?
|
|
|
|
|
Logged
|
|
|
|
|
Il Grande Inquisitor
|
|
« Reply #11 on: 18:40:32, 06-04-2008 » |
|
IGI, which DVD audio ripper did you use?
Bryn, it's DVD Audio Ripper 4.0.98 from ImToo Software Studio, the second listed programme on Ron's link page. It seems quite straightforward to use (for someone with little understanding of these things). I trialled it first (you can convert the first 5 minutes of longer files or 50% of files less than 5 minutes) and was impressed by the sound. You can set the bitrate (up to 320 kbps). I record from Sky using LPCM on a JVC HDD recorder). The first things I've converted are from Sky's Radio 3 feed. I shall try one of my BBC4 Prom recordings later. |
|
|
|
|
Logged
|
Our chief weapon is surprise...surprise and fear...fear and surprise.... Our two weapons are fear and surprise...and ruthless efficiency
|
|
|
|
Bryn
|
|
« Reply #12 on: 19:33:03, 06-04-2008 » |
|
Thanks IGI, unfortunately it seems to be limited to a maximum sample rate of 48k. I could really do with something that can handle 96k, too.
|
|
|
|
|
Logged
|
|
|
|
ariosto
Gender: 
Posts: 33
|
|
« Reply #13 on: 11:16:31, 24-04-2008 » |
|
Bryn
I'm wondering if you think a 96Kh sampling rate makes much difference to using 48Kh or 44.1Kh?
I can only use the 44.1 and 48Kh sample rates at present (but at 24 bits) - and I wonder if there is any audible difference. I do notice an improvement from 16 to 24 bits, but I wonder about the sampling rate, although I realise that it increases frequency response from about 22k to 44K or more. But personally I probably would not notice the higher frequencies anyway. Is signal to noise ratio improved as well at the higher sampling rates?
|
|
|
|
|
Logged
|
Ariosto
|
|
|
|
Bryn
|
|
« Reply #14 on: 12:31:32, 24-04-2008 » |
|
Hi ariosto, my ears are now past hearing anything above about 13kHz. I do use 96k and 24 bit when I have the space, but mainly because I would rather do any editing, post-production level adjustments, etc. at the higher definition before down-sampling to 48 or 44.1k, with noise shaping, for burning to CD or DVD. Come to that, as others with younger ears might benefit from the higher sampling rate, if burning to audio DVD I will leave the sampling at 96k, should there be room on the disc. Human hearing is a complex matter. It is no simple linear system. While we may not be able to hear frequencies above 20kHz directly, the way higher audio frequencies may impact upon lower, audible frequencies, may have subtle colouring effects.
|
|
|
|
|
Logged
|
|
|
|
|
