Quote:
Hi Mapleleaf,
> I did notice that a 10% cpu load will occur when one selects HD.
What do you mean by HD?
> Btw, did you ever check out that tcp/ip issue with the 'time-wait status' ?
Nope, not yet anyway...
About kernel streaming: Kernel streaming bypasses the Windows kMixer, an annoying piece of software that combines audio from different programs into one audio stream that is sent to the sound card. Especially older sound cards needed this because they didn't have the capability to play multiple streams simultaneously.
Because there's only one stream, kMixer often has to downsample or upsample streams before they can be combined. Often the drivers can be configured to always use a specific sample rate and number of bits (usually by default 44.1 kHz, 16 bits). Anything sent to the card with another sample rate is converted in that case. The kMixer sample rate converter is really bad, which often leads to really bad sound quality when this occurs.
I'm using the ESI Juli@ card for MPX output. If ANYTHING happens to the MPX signal, it won't be received correctly by the radio anymore. Since it is received correctly, I know that my sound card perfectly reproduces whatever I send to it. So there's no need to use kernel streaming. The driver switches automatically (which only works if you only use one program at a time), so kernel streaming won't give better results. On Windows Vista however, the driver doesn't support automatic switching and I do have to configure the intended sample rate and bit depth manually. (Without doing that I also cannot broadcast the MPX signal).
ooops typo should be HQ sorry> I did notice that a 10% cpu load will occur when one selects HD.
What do you mean by HD?
> Btw, did you ever check out that tcp/ip issue with the 'time-wait status' ?
Nope, not yet anyway...
About kernel streaming: Kernel streaming bypasses the Windows kMixer, an annoying piece of software that combines audio from different programs into one audio stream that is sent to the sound card. Especially older sound cards needed this because they didn't have the capability to play multiple streams simultaneously.
Because there's only one stream, kMixer often has to downsample or upsample streams before they can be combined. Often the drivers can be configured to always use a specific sample rate and number of bits (usually by default 44.1 kHz, 16 bits). Anything sent to the card with another sample rate is converted in that case. The kMixer sample rate converter is really bad, which often leads to really bad sound quality when this occurs.
I'm using the ESI Juli@ card for MPX output. If ANYTHING happens to the MPX signal, it won't be received correctly by the radio anymore. Since it is received correctly, I know that my sound card perfectly reproduces whatever I send to it. So there's no need to use kernel streaming. The driver switches automatically (which only works if you only use one program at a time), so kernel streaming won't give better results. On Windows Vista however, the driver doesn't support automatic switching and I do have to configure the intended sample rate and bit depth manually. (Without doing that I also cannot broadcast the MPX signal).
I still think you should at least look into the aspect of the difference between kernal streaming and direct streaming.
Yes. not all sound cards have it but for those that are using ST it is worth considering since the quality difference between the two is vast.
When I switch to direct output streaming too many artifacts are inidcated but switching over to kernal output streaming clear channel.
Granted the type and/or make of the sound card will decide which output mode you should follow.
Ok, here is a thought. why not try to find out from those who are using ST and SAMBC or SAMDJ what output mode they are using or capable of using. A good statistic to have then and only then depending on the number returned you can then proceed(a suggestion).
Btw, I am only 3hrs drive from you and I'll be happy to pack my system and drive over it's time I need some 'het kanon' and Maaslander kaas.
regards
mapleleaf