Streamerp2p Forum

[Last Update: 17.05.2003]

Some Nominal 'translations' in mono( sounds better;less bandwith )
and settings in oddcast

homework is still in progress

Oddcast settings for stereo freaks

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higher bitrates try yourself. I think 96kbps are high enough at the moment

Oddcast DSP
Please check for updates by visiting the main page from oddsock.
http://www.oddsock.org/tools/dsp_oddcast/

01/02/2003 Updates
Unfortunately, this page got lost in a server crash, so there isI no update info for the releases between 10222002 and 01022003....but imagine some progress was made...on some things...probably...

http://www.oddsock.org/tools/dsp_oddcas ... 022003.exe
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Version : 12142002 - Last Modified: December 14, 2002 3:04 am
Fixed the problem with Shoutcast 1.9.2 and oddcast sending the wrong content-type...whoops..

http://www.oddsock.org/tools/dsp_oddcas ... 142002.exe
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10/22/2002 Updates -
Fixed the bitrate management problem with vorbis...you can now use bitrate management to limit your stream in the same way you can do it with Lame VBR..But be warned, when you do this, the quality will be degraded as opposed to using quality levels.

Download:
http://www.oddsock.org/tools/dsp_oddcas ... 222002.exe
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Last Modified: October 11, 2002 5:51 am
Download:
http://www.oddsock.org/tools/dsp_oddcas ... 192002.exe
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***Hint: Sometimes the oddcast plugin 'forgets' to load the config! (the oddcast set Quality Mode back to 0)
When you plan to broadcast, always open your 'oddcast config' first, to be sure that your selected settings are loaded.

Hi all

If you ever try sending vorbis it will be much more important to know the max. bitrate than the nom. bitrate (vorbis is VBR, not CBR). Test I'm making show me that the max bitrate can up to 70% higher bitrate than nominal. To prevent reconnection and receptor buffering think about it.

mono SR 22.05 kHz q -0.50 will give me 34 kHZ max. instead of 20 kHz nom. bitrate.

Find your best settings by making your own test.

Good luck and stream on.

AndilgE

welcome to the club
yes, everybody who wants to produce a good ogg stream must do their HOMEWORK, by testing out the ultimate settings.
Dependent on the kind and quality of your source files or line in settings,eq, dsp plugins and all that Duff...

or even others like mono stero 22050, 44100

for example:
1 stereo 22050Hz = 45kb nominal 52 - 55 in WinAmp
-1 stereo 44100 Hz = 45kb nominal 56 - 59 in WinAmp
-0.15 mono 44100Hz = 45kb nominal 53 - 55 in WinAmp

well here for me, with my sounds ....

Good luck while explorin´
Pete

i set the kbps to 48k, but after a wile its going up to 115k ?

@dave69 and other who experienced this phenomena. Setting the Oddcast to OGG in quality 0 should keep it around 64 kbps, that's an averige. So it can be like 60 up to 68.

Now that kind of swing is no problem right? When relaying a regional radiostation I noticed that it was even more stable. Steady around 60 Kbps. Only 2 Kbps swing.

And when I broadcasted my own playlist suddently it took extreme jumps. I cursed WinAmp for it. The OGG Vorbis. But suddently a pattern became clear. Amplitudes, meaning from the most soft sound up to the most loud one. Too many extreme swing and overdrives causing clipping stress out the OGG Vorbis encoder.

So that's it? Yes, use MP3Gain on your MP3 collection, and set them all to 89 dB individually. Just drag and drop 'm. After I did this myself even loud songs like Last Resort did not freak out the Oddcast, but showed the normal swing pattern.

If you have a lot of OGG files this will be harder to achive. I tried vorbisGAIN, but it made it sound worse, Hi's started hissing. Do not know why but I decided to CDex my OGG's. Now I set it to 89%. It is kind of stupid, because it is not the same as dB's, but it seems to work.

After this, everything seemed to keep the OddCast in OGG more stable. Sometimes I still have swings up to 74 Kbps. But that are songs that did not gain, so there seems to be logic in this all.


So a rule seems to be, the louder your audio is encoded, the more swings it creates in your broadcast. 89% or 89dB seems to be a good figure.

OGG is better than MP3, MP3pro is awefull, and AAC plus has certain licence thingies. OGG vorbis is open source, and if you learn what the encoder likes to be 'fed' with you'll get an amazing sound at only 64 kbps.

BTW When I encoded my discotheque I use quality 5, which takes about 160 Kbps. In MP3 you would need like the double value to get the same quality.

PS Using the line in on one PC specially for broadcasting, and another as your studio, you could use a compressor/limiter, so the audio input is always in the right volume.

I experimented with WinAmp using a software solution called Enhancer 0.17, but I'm not conviced yet that it will work on a 1 PC solution.
You'll also need a plugin called MultiFX to use this. With this one you can use more than 1 Plugin at a time. Note: Remember to put Oddcast last in the Row.

Hi,
have a loock at the lists above. There are the oddcast quality settings and the resulting nominal bitrates. The bitrate you can set in streamer broadcast settings does not limit your stream to that value.

bye

@D-tracks, your lists are very usefull indeed. But the problem is not the small amount of swing in Kbps, but something swinging from 56 to 144 and back to 67 all the the time.

You could state that if your bitrate swings do not match to the lists shown in this Topic, there is something with the amplitude swings in your tracks.
Meaning they need to be regained.

After that has been done, the bitrates will indeed swing in Kbps like they should, as shown in the lists in this topic.

The lists are very handy indeed, to check how your Oddcast setting should be and within what limits it is allowed to swing.

The more stable the input, without clipping, or to many amplitude boosts, the more stable will the Oggstream be. Swings ranging from -10% upto + 10% could be considered more or less normal I guess.

I've been using Quality -0.7 or -0.6 for a long time and always from the line input. I do not get the swings. This is consistant with your findings I would have to say.

I've also had people report large swings when casting direct from Winamp that all smoothed out as soon as they switched to line in mode and then selected the 'what you year' or "stereo mix" recording input of their soundcard. Even though it's on the same machine, there is much less variance in the bitrate when done this way. Of course, all soundcards don't offer this mixer setting.

If the encoding computer is under heavy load then your dsp will stop sending data to Streamer for a few seconds, and then it will send a burst of data at high speed, to catch up. If this is happening for about a minute or more (?) then Streamer will measure the peak bitrate and show a much higher value than your real average bitrate.
I'm not sure if I'm 100% right about this but I've seen this behaviour many times when I've tortured my computer with more things than I should while broadcasting.