similar to: Stereo channel separation

>On 11/20/2013 03:37 PM, O'Connor, Kevin wrote: >> I have an application I intend to use Opus for that involves creating > recordings of two-party conversations where each party is saved as a >> separate channel. Audio may be later processed or analyzed on a >> per-party basis so if audio in one channel affects the other channel, >> it could create problems.

>On 11/20/2013 03:37 PM, O'Connor, Kevin wrote: >> I have an application I intend to use Opus for that involves creating >> recordings of two-party conversations where each party is saved as a >> separate channel. Audio may be later processed or analyzed on a >> per-party basis so if audio in one channel affects the other channel, it >> could create problems.

On 11/20/2013 03:37 PM, O'Connor, Kevin wrote: > I have an application I intend to use Opus for that involves creating > recordings of two-party conversations where each party is saved as a > separate channel. Audio may be later processed or analyzed on a > per-party basis so if audio in one channel affects the other channel, it > could create problems. My question is, if I use

O'Connor, Kevin wrote: > Is this bleedover expected? I found an older copy of opus-tools (0.1.6, libopus 1.0.2) and it does not appear to > have the bleedover between channels, so I think this was introduced in 1.0.3 or 1.1. This bleed-over should not be possible with the CELT layer (_especially_ not during silence), but it is possible with the SILK layer. 1.1 added automatic speech

Hello, I've been using Opus on an STM32 M4 platform for speech coding in mono mode. I thought I'd try stereo for grins to see if I can handle the CPU load, and I'm getting a return code of -1 from opus_decode_float (using CBR and 40ms frames). I decided to try the opusenc and opusdec tools to just see how the command line apps would behave. I am getting decoded audio, but I am

Hello all, I created today a fake stereo piece of music (the left and right channels were completely equal), and encoded it with the all the modes the RC2 encoder supports, and found that: * * dual * waste * waste * * mode * joint * stereo * in * in % * * * stereo * /2 * kbits * of JS *

Thanks. When you say that with fec enabled, the threshold is increased, do you mean the bitrate - i.e., you need higher bitrate with fec enabled to suppress crosstalk? Also, can you make any recommendations to decide whether to use fec or not? We are trying to tune the parameters appropriately. Audio quality and reduction of crosstalk are critical for us. Thanks again. Jon Sent from my

On 27/01/17 12:16 PM, Jon Lederman wrote: > When you say that with fec enabled, the threshold is increased, do > you mean the bitrate - i.e., you need higher bitrate with fec enabled > to suppress crosstalk? Correct. Another effect I forgot to mention is that Using FEC will actually force SILK/hybrid rather than CELT, so it's possible that disabling FEC makes you use CELT, which

We have a customer who wants us to record anywhere from 2-4 participants on a call in stereo (as opposed to mono) quality audio. Some background.. We are using asterisk 16.6.1 We are also currently using AMI/AsyncAGI and ConfBridge to bring the parties together. I believe recording in the various file formats (based on extension), it's always recording in mono quality. My one thought is to

On 27/01/17 12:29 PM, Jon Lederman wrote: > Thank you. Yes, we do need both channels independent. So, if we > encode each channel separately, we will be sacrificing the > compression ratio we would achieve with stereo encoding, correct? Not necessarily. Stereo makes two assumptions: 1) It assumes the two channels are somehow correlated 2) It assumes the two channels are meant to be

Hi guys, I am on a C55x stereo implementation of CELT 0.7.1; I am using 100 sample frame size and writing 58 Bytes per Packet. At the output of the decoder I see one channel reconstructed perfectly, but the other channel has random corruption that appears to be a sinusoid with a period of the frame size. The artifact is non-periodic and appears to happen randomly during the audio stream. Anyone

Hello, I've been postponing some of my encoding for when joint stereo gets implemented. The reason I've been doing this, is that I am under the impression this is the largest step in the quality/bitrate ratio that's left. Now I'm wondering if I am correct in thinking this. lame's documentation seems to imply it doesn't make much of a difference at higher than 128kbps (I

Hi, One other question I was wondering about. Is the reason that we hear the crosstalk with fec and packet loss percentage>0 is that Opus uses information from the left channel to try to error correct the right channel and vice versa? I am trying to understand the origin of the crosstalk. Thanks. -Jon > On Jan 27, 2017, at 12:29 PM, Jon Lederman <jon at soniccloud.com> wrote: >

On Jan 17, 2013, at 21:41, Ralph Giles wrote: > On 13-01-17 7:26 PM, Brian Willoughby wrote: >> I vote for documenting the --channel-map option in the --help > > Do you ever use --channel-map yourself, or recommend it to clients? Professional surround mastering is delivered on very specific media, and FLAC is not an option (to my knowledge). I use FLAC for archival of original

I vote for documenting the --channel-map option in the --help I don't like the idea of rejecting a multichannel file merely for mapping, so there should be a documented option plus an error message pointing to the option. This should compare to the WAVE and AIFF errors where the utility suggests to the user how to get the file converted safely. Brian Willoughby Sound Consulting On

I'd like to know if there's a way to non-destructively reverse L-R channels in an ogg vorbis file? I've been recording live classical sources, but until tonight haven't listened to them on anything with even approaching decent stereo separation. Well, you guessed it. Why the hell are the violins on the right and the brass on the left? Checked my equipment and sure enough, cable

Dear All: I studied the stereo couple documents and now confused, I wonder why it can be done like that, and what is the principle behind that. I think i am confused perhaps because i have no background knowledge, can you help me out? Also, when doing the T/F transform,we used MDCT, so it means no imaginary part. And i am much puzzled about the angle in the stereo couple,what does it mean?

Hi, If I want to encode two audio channels that are not related, audio from two different sources not stereo, is it best to create two instances of a single channel encoder or use one encoder with two channels? thank you, Paul.

Hello all, I can't get stereo with wineasio, even the new verison of wineasio which I have compiled > 1.7.4. when I open an app with wine, I do see the connections in Qjack connections, but It is not in stereo Ardour can verify this, and both left and right connection are connected from wine to jack, I have googled for this answer to no aval and I have asked numerious times on IRC in

I'm new to the mailing list but am interested in picking up a thread from earlier in the month but which I thought had become confusing so I am starting again. I should admit from the beginning that I am a colleague of Alex Brims who started the original thread. The thread in question related to a wav file with an extra two bytes at the end causing a partial sample error in the reference