No, that's not the case, but thanks for a good guess none the less. The audio is coming through the USB audio input. Not through an open mic on the computer, which doesn't exist. Furthermore I don't even need to have the volume up on the K3 to see the audio on the scope, and there is NO analog connections to the computer. However, I dont see Post audio effects going on. In otherwords, I can only see pre-Notch etc settings... Guess it's just a voodo rig... T Smith SWL > Date: Fri, 19 Nov 2010 01:41:31 -0500 > From: li...@subich.com > To: notforc...@hotmail.com > CC: elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3: USB port > > > > >> I'm sorry, perhaps I'm mistaken, but I've already hooked up my K3 > >> using a serial to USB converter cable, and then turned on > >> Spectrogram and found that the audio IS already there. Do I have a > >> voodoo K3, or is someone else mistaken that this feature already > >> exists? > > No, you probably don't realize that Spectrogram uses the default > audio input device and that Windows systems commonly default to the > computer's built-in microphone. You are probably getting nothing more > than "acoustic coupling" between the K3 speaker and the computer's > mic. This assumes that you have not intentionally configured the > K3 and computer to use a cable between the K3 Line Out jack and the > computer's Line In jack and made that the default. > > There is no audio connection to the K3 RS-232 port ... read the > schematics! > > 73, > > ... Joe, W4TV > > > On 11/19/2010 12:32 AM, The Smiths wrote: > > > > I'm sorry, perhaps I'm mistaken, but I've already hooked up my K3 using a > > serial to USB converter cable, and then turned on Spectrogram and found > > that the audio IS already there. Do I have a voodoo K3, or is someone else > > mistaken that this feature already exists? > > > > T Smith > > SWL > > > >> Date: Thu, 18 Nov 2010 20:20:33 -0500 > >> From: li...@subich.com > >> To: k2qi....@gmail.com; elecraft@mailman.qth.net > >> Subject: Re: [Elecraft] K3: USB port > >> > >> > >> Moving from RS-232 to USB for commands (CAT) is trivial - replace > >> the DB9 with one of the FTDI devices that is a USB to RS-232 > >> converter built into the DB9 socket. However, that does not get > >> you audio ... > >> > >> To do audio, you would need not only the USB converter but a hub > >> and USB Audio CODEC (e.g. PCM8902 or similar). Then Elecraft > >> would need to build controls for the USB CODEC (ADC/DAC) and do > >> all the other software support - further burdening the K3 CPU. > >> > >> After all that, all you've done is move the USB soundcard, USB > >> to serial converter and USB hub into the K3 and added a whole new > >> level so support burden - providing operating system specific > >> drivers for each version of Windows (along with the cost of > >> signing drivers with Microsoft), specific drivers for each version > >> of OS-X, and specific drivers for each unique version of LINUX. > >> By the way ... depending on the USB Audio chip set (ADC/DAC) and > >> USB hub, you might find yourself needing specific drivers for each > >> chip (Audio, hub, control) *and* EEPROM to customize, control and > >> serialize each of those chip! > >> > >> After all of that you have not provided any new capability for > >> the K3. Other than adding at least $100 per unit in hardware, > >> development, and ongoing support costs the only thing this exercise > >> will accomplish is to relieve a relatively small number of users > >> of the need to purchase a KUSB and allow them to keep their sound- > >> card free for iTUNES. For all the rest, you have increased the > >> cost of the K3, added an entirely new level of complexity to the > >> rig, and perhaps required that the user purchase new hardware to > >> use their rig with computer control. > >> > >> 73, > >> > >> ... Joe, W4TV > >> > >> On 11/18/2010 7:31 PM, James Sarte (K2QI) wrote: > >>> Hello group, > >>> > >>> I know Wayne has mentioned several times in the past that they had > >>> considered all possibilities when it comes to PC interfaces for the K3, > >>> including USB. In fact, he says the following on 16 June, 2009: > >>> > >>> "The KIO3's digital I/O module could be replaced with one that has USB > >>> rather than RS232 -- or better yet, both. We planned for this. > >>> > >>> The reason we went with RS232 initially is that many hams are still > >>> using PCs that have only RS232 ports. Those who prefer to use USB can > >>> use an inexpensive USB-to-RS232 adapter. There is no difference in I/O > >>> performance between the two methods. " > >>> > >>> Just wanted to revisit this topic and find out if anyone has heard > >>> anything > >>> more regarding a possible USB interface for the K3. I know it's not for > >>> everyone, but for myself and perhaps others out there, the ability to > >>> carry > >>> all data, including audio on a single cable would be convenient. Right > >>> now, > >>> I'm using a Keyspan USB to RS232 adapter for data, along with two separate > >>> stereo cables for audio. I don't have any real complaints with that setup, > >>> but could be problematic when transferring the rig around from computer to > >>> computer. > >>> > >> ______________________________________________________________ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net
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