Hi Brian,

 

House hunting's on hold at the moment. Relationship's on hold to but I won't go in to that.

 

I'll download winamp now and have a listen a little later after my daughter's up. Just got a 56K modem/router so you're in luck, I have more than 33.6Kbps dialup access now.

 

The problem with 56K modems is the re-training. There's also no such thing as every line being equal. 56K modems re-negotiate (re-train) their connection speeds to often on some lines because they can't sustain the connection at the current or previous speed due to line noise etc... I gave up on 56K modems for that reason. 33.6 might be a little slower but they don't disconect as bad or pause all the time from re-training.

 

In saying that, why I got a new, used 56K modem/router was... I used to experiment with streamed audio across town from modem to modem without the Internet (private IntrAnet). I still do on occasion.

 

For one, it was second hand business router and for $15 I couldn't go wrong when it would cost me $20 for a new PCI modem. Secondly the router seems to have a better class modem in it, and the third bonus I can dial directly in to it from elsewhere at 33.6Kbps which gives me a private secure line to the machines on my LAN without using the net.

 

Gavin.

 

 

 

----- Original Message -----

From: Brian Gallagher

To: LPFM_Radio@yahoogroups.com.au

Sent: Monday, November 13, 2006 10:33 AM

Subject: Re: [LPFM] audio decoding - sample rate conversion

Hi Gav

Must chat with you re your desertations sometime.

Are you still on dialup at all?

If so can you listen via winamp url box to http://stream1.noise.net.nz:8000/dannevirke.ogg    to see if it will stay connected sometime please.It is going fine via broadband but at a bitrate of 32kb I am hoping that reception via dialup may be ok too.

How is the househunting going?

Regards

Brian

Gavin Stephens <gstephens@orcon.net.nz> wrote:

Hi guys,

 

Does anyone know of a programme that will allow me to convert a mono wave to stereo wave file from the command line?

 

This may interest the od LPFM station that uses the Newstalk ZB affliliate units FTP service.

 

I've been tidying up some scripts/batch files I've been slowly perfecting over the past 4 years after creating some for use with the Newstalk ZB affiliates FTP service. Orginally I created them to download the news, decode it, normalise it in to a system using everything at 98% peak audio levels, then tag the files and import them in to Simian automation software unattendent.

 

Anyway, the one thing I'd like to see done is for the service to deliver news in an mp3 VBR format but in MONO for distribution and bandwidth savings. This reduces the file size from the current ACM mp2 @256kbps stereo files of around 4.6MB for the news alone, to around 1.4MB. I was told the other day TRN's latest IT cheif is interested again in providing and MP3 option (had one of those emails about 4 years ago saying they were looking in to it but then Ed Taylor left and I left the station I was with at the time), but I'm coming up with a means to do it easier for them again.

 

The only problem I have is converting a mono file back to stereo at the command line for clients. I can easily make a simple script for their end to take the current format, decode it, re-encode to MP3 VBR in mono, but some professional sound cards can't handle different sample rates or from stereo to mono and back again. So I need to come up with a way to automate the client end to convert the file back to stereo.

 

I've had a good search on the net but I can't find much in the way of command line tools for decoding back to stereo or taking an exsisting mono wave file and convert it to stereo.

 

Anyone know of anything that could do this in this way for me? I'd be happy to share some scripts or batch file ideas for those who do use the service and want to automate downloading/decoding and NORMALISING the audio for those who think it's under-recorded.

 

Thanks,

Gavin.

 

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