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group:Audio Capture
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On Jan 31, 4:47 pm, "News Groups" <news...@le-poidevin.com> wrote: > Hi, I would like to be able to capture the audio coming in through the Line > In port on my soundcard, using VB.net 2008 Express. I know there are > prebuilt > things that can do this but I would like to build my own!. I've searched the > web but cannot find anything that helps me to get my head around what I need > to do. The reason for all of this is that I can receive data signals from my > radio (i.e. taxi dispatch) and I will push this in through the sound card > and > then decode the data with software. This has been done and is available in > various languages but I've not seen it in VB. > Please format any replies in simple terms and also any examples would be > better in VB and not C! > Thanks > Nigel. I also wonder audio / video capturing classes, but it seems in .net 2.0 or newer frameworks do not provide that kind of classes natively. 3rd party COM libraries might be needed. It would be great if there was a line-in input and real-time mp3 encoding recording capable library for that purpose. I know Windows built-in sound recorder is bad for recordings over 60 seconds with
Hi, I would like to be able to capture the audio coming in through the Line
In port on my soundcard, using VB.net 2008 Express. I know there are prebuilt things that can do this but I would like to build my own!. I've searched the web but cannot find anything that helps me to get my head around what I need to do. The reason for all of this is that I can receive data signals from my radio (i.e. taxi dispatch) and I will push this in through the sound card and then decode the data with software. This has been done and is available in various languages but I've not seen it in VB. Please format any replies in simple terms and also any examples would be better in VB and not C! Thanks Nigel.
kimiraikkonen <kimiraikkonen85@gmail.com> wrote in news:fe4035bb-6fa4-402e-
90af-6ea08bee4b13@s13g2000prd.googlegroups.com: [quoted text, click to view] > I also wonder audio / video capturing classes, but it seems in .net > 2.0 or newer frameworks do not provide that kind of classes natively. > 3rd party COM libraries might be needed. Managed DirectX does provide recording capabilities from what I recall. Or you can use a library called BASS. [quoted text, click to view] > It would be great if there was a line-in input and real-time mp3 > encoding recording capable library for that purpose. I know Windows > built-in sound recorder is bad for recordings over 60 seconds with > only PCM support. --
[quoted text, click to view] "Spam Catcher" <spamhoneypot@rogers.com> wrote in message news:Xns9A367E4E5104Eusenethoneypotrogers@127.0.0.1... > kimiraikkonen <kimiraikkonen85@gmail.com> wrote in > news:fe4035bb-6fa4-402e- > 90af-6ea08bee4b13@s13g2000prd.googlegroups.com: > >> I also wonder audio / video capturing classes, but it seems in .net >> 2.0 or newer frameworks do not provide that kind of classes natively. >> 3rd party COM libraries might be needed. > > Managed DirectX does provide recording capabilities from what I recall. Or > you can use a library called BASS. > >> It would be great if there was a line-in input and real-time mp3 >> encoding recording capable library for that purpose. I know Windows >> built-in sound recorder is bad for recordings over 60 seconds with >> only PCM support. > > > > -- > spamhoneypot@rogers.com (Do not e-mail) You're right. My company is using DirectX to record from the microphone input and do sound editing. To do mp3 encoding, you have to have a LAME encoder. DirectX records to .wav format. Note that the LAME encoder is free for a consumer, but if you package it inside your product and sell your software, you have to pay license fees. RobinS. GoldMail, Inc.
[quoted text, click to view]
On Feb 2, 8:25 am, "RobinS" <rob...@imnottelling.com> wrote: > "Spam Catcher" <spamhoney...@rogers.com> wrote in message > > news:Xns9A367E4E5104Eusenethoneypotrogers@127.0.0.1... > > > > > kimiraikkonen <kimiraikkone...@gmail.com> wrote in > > news:fe4035bb-6fa4-402e- > > 90af-6ea08bee4...@s13g2000prd.googlegroups.com: > > >> I also wonder audio / video capturing classes, but it seems in .net > >> 2.0 or newer frameworks do not provide that kind of classes natively. > >> 3rd party COM libraries might be needed. > > > Managed DirectX does provide recording capabilities from what I recall. Or > > you can use a library called BASS. > > >> It would be great if there was a line-in input and real-time mp3 > >> encoding recording capable library for that purpose. I know Windows > >> built-in sound recorder is bad for recordings over 60 seconds with > >> only PCM support. > > > -- > > spamhoney...@rogers.com (Do not e-mail) > > You're right. My company is using DirectX to record from the microphone > input and do sound editing. > > To do mp3 encoding, you have to have a LAME encoder. DirectX records to .wav > format. Note that the LAME encoder is free for a consumer, but if you > package it inside your product and sell your software, you have to pay > license fees. But as you know LAME does not provide a wrapper for VB.NET, it has a unmanaged dll as lame_enc.dll written in C++. Callling it under VB.NET might be frustrating, the easiest wrapper to understand might be lame.exe as being comman-line shell program.
On Feb 2, 9:10=A0pm, "Herfried K. Wagner [MVP]" <hirf-spam-me-
[quoted text, click to view] h...@gmx.at> wrote: > "News Groups" <news...@le-poidevin.com> schrieb: > > > Hi, I would like to be able to capture the audio coming in through the > > Line > > In port on my soundcard, using VB.net 2008 Express. I know there are > > prebuilt > > things that can do this but I would like to build my own!. I've searched= > > the > > web but cannot find anything that helps me to get my head around what I > > need > > to do. The reason for all of this is that I can receive data signals fro= m > > my > > radio (i.e. taxi dispatch) and I will push this in through the sound car= d > > and > > then decode the data with software. This has been done and is available = in > > various languages but I've not seen it in VB. > > Solution using MCI: > > <URL:http://google.com/groups?selm=3D%23sOwNO7IHHA.4712%40TK2MSFTNGP04.phx= ..gbl> > > -- > =A0M S =A0 Herfried K. Wagner > M V P =A0<URL:http://dotnet.mvps.org/> > =A0V B =A0 <URL:http://dotnet.mvps.org/dotnet/faqs/> If you record in CD quality (44100 freq, 16bit sampling, 2 channels) a random distortion and corruption is occured in some parts of recorded wave file with this MCI code. No problem with Windows's built-in Sound Recorder with this settings on same system. Also using 8bit instead of 16bit sampling helps to get rid of this sound corruption problem for
"News Groups" <newsgrp@le-poidevin.com> schrieb:
[quoted text, click to view] > Hi, I would like to be able to capture the audio coming in through the > Line > In port on my soundcard, using VB.net 2008 Express. I know there are > prebuilt > things that can do this but I would like to build my own!. I've searched > the > web but cannot find anything that helps me to get my head around what I > need > to do. The reason for all of this is that I can receive data signals from > my > radio (i.e. taxi dispatch) and I will push this in through the sound card > and > then decode the data with software. This has been done and is available in > various languages but I've not seen it in VB. Solution using MCI: <URL:http://google.com/groups?selm=%23sOwNO7IHHA.4712%40TK2MSFTNGP04.phx.gbl> -- M S Herfried K. Wagner M V P <URL:http://dotnet.mvps.org/> V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
[quoted text, click to view] "kimiraikkonen" <kimiraikkonen85@gmail.com> wrote in message news:e44eff18-f792-44e6-b01d-cc00cc26a0b9@e23g2000prf.googlegroups.com... > On Feb 2, 8:25 am, "RobinS" <rob...@imnottelling.com> wrote: >> "Spam Catcher" <spamhoney...@rogers.com> wrote in message >> >> news:Xns9A367E4E5104Eusenethoneypotrogers@127.0.0.1... >> >> >> >> > kimiraikkonen <kimiraikkone...@gmail.com> wrote in >> > news:fe4035bb-6fa4-402e- >> > 90af-6ea08bee4...@s13g2000prd.googlegroups.com: >> >> >> I also wonder audio / video capturing classes, but it seems in .net >> >> 2.0 or newer frameworks do not provide that kind of classes natively. >> >> 3rd party COM libraries might be needed. >> >> > Managed DirectX does provide recording capabilities from what I recall. >> > Or >> > you can use a library called BASS. >> >> >> It would be great if there was a line-in input and real-time mp3 >> >> encoding recording capable library for that purpose. I know Windows >> >> built-in sound recorder is bad for recordings over 60 seconds with >> >> only PCM support. >> >> > -- >> > spamhoney...@rogers.com (Do not e-mail) >> >> You're right. My company is using DirectX to record from the microphone >> input and do sound editing. >> >> To do mp3 encoding, you have to have a LAME encoder. DirectX records to >> .wav >> format. Note that the LAME encoder is free for a consumer, but if you >> package it inside your product and sell your software, you have to pay >> license fees. > > But as you know LAME does not provide a wrapper for VB.NET, it has a > unmanaged dll as lame_enc.dll written in C++. Callling it under VB.NET > might be frustrating, the easiest wrapper to understand might be > lame.exe as being comman-line shell program. > Yes, you're right. This, and the licensing issue, is why we send the sound file up in wav format, and convert it to mp3 on the server. RobinS. GoldMail, Inc.
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