I have received some personals emails and thought it would be better to answer here. Xipar does have a much wider range of audio and yes it does have filters than can be adjusted so I am not using this comparison in the usbradio / simpleusb comparison. Dave... Are you actually calibrating your head set with the service equipment? If not then you don't have a base level to compare against. I still can't find the graphs I had from this or I would post them. The screen went on my test equipment so I can't do anymore testing until I find another screen. Sent from my iPhone
On Nov 1, 2015, at 3:50 PM, David McGough <kb4fxc@inttek.net> wrote:
Hi Guys,
I agree 100% that personal attacks only start flame wars and don't solve any problems.
However, I do agree with Fred. For those who haven't heard the difference between simpleusb and usbradio, I suggest a simple test with a stock USB sound FOB and a computer audio headset and mic combo....Put the USB FOB in full duplex mode and talk to yourself. While I realize this is an unscientific test, the difference between the two channel drivers is immediately obvious and striking!
While many hams out there (including myself) do have great -radio- test equipment, most lack the equipment to carefully check audio dynamic range, frequency response and other audio-specific parameters.
Incidentally, for comparison purposes, another interesting experiment is to try this same headset test with one of the commercially available analog controllers out there...I've tried that, too, and as expected, the performance is even better, substantially better....But, I digress.
If anyone wants to try this and doesn't know how to proceed, I'll post a link to my exact test setup, if interested.
Anyhow....Please don't take these comments in a negative way. My -only- intention is to push the state-of-the-art forward.
73, David KB4FXC
On Sun, 1 Nov 2015, Jim Duuuude wrote:
Fred, this list is NOT a place for personally insulting remarks such as that. That type of behavior is not tolerated here.
Besides, as far as I am aware, Cory has, and uses, more then his 'ears' to make such determinations. He is one of the people on this list that has good, proper test equipment, and knows how to use it.
Jim, WB6NIL
To: n3fe@repeater.net From: fred@fmeco.com Date: Sun, 1 Nov 2015 14:56:58 -0500 CC: app_rpt-users@ohnosec.org Subject: Re: [App_rpt-users] USB Adapter has no EEPROM installed
Cory, You might have your hearing checked, you most likely think d-star sounds good also.
I never said USBradio was horrible, simply said usbradio audio is superior. It's a subjective thing, most can hear the difference.. obviously you can't or you would not have made such a statement...
The only answer to the argument you want.. Fred
On 11/1/15 12:54 PM, Corey Dean wrote:
What degraded audio? I have ran many many test and have yet to find this 'degraded audio'. I have heard people talk about it but have yet seen any proof...
Sent from my iPhone
On Nov 1, 2015, at 12:32 PM, Fred Moore <fred@fmeco.com> wrote:
Larry can't answer #1. I simply program the radio to provide what I want on the accessory connector, then there is no EEPROM needed.
As for answer #2 When you have COS and CTCSS (PL) available use simpleUSB it not only requires less processing power, it also does not suffer from degraded audio.
Just add the file and stanza you need..
regards.. Fred
On 11/1/15 6:21 AM, Larry da Ponte wrote:
Two questions for the group:
#1 I'm seeing this in my /var/log/asterisk - I'm using a DMK URI with EEPROM and a Motorola GM300 with one of Marshall's Motorola Maxtrac, GM300 and M120 16 Pin Radio to URI cables.
[Nov 1 11:30:05] NOTICE[6852] chan_usbradio.c: USB Adapter has no EEPROM installed or Checksum BAD on channel usb42372
I understand that the benefit of the DMK URI with EEPROM is that the interface configuration can be stored in the URI as apposed to (where else?) - is this URI EEPROM feature taken advantage of with app_rpt and associated drivers?
#2 How do I choose which channel driver to use - simpleusb or USBRadio? From what I've been able to learn through varius wikis and posts on the subject, I would want to use simpleusb because all of the hardware connections for COS and CTCSS are provided so there is no reason to use the DSP features of USBRadio thus simplifying what the driver has to do and perhaps lowering the CPU utilization. I've also read some posts that describe audio degredation in the USBRadio driver but I can't tell you the cause. I expect the right answer here is for me to try out both and experiment - which I will do but would appreciate any wisdome from the group on their experience with these drivers when using the DMK URI and hardware connections for COS/CTCSS. My current configuration below is getting favorable audio reports.
I have no simpleusb.conf in my /etc/asterisk I have usbradio.conf and usbradio_tune_usb42372.conf
I have the following in my rpt.conf: rxchannel=Radio/usb42372
I have the following in my usbradio.conf:
[usb42372]
hdwtype=0 rxboost=1 txboost=1 rxctcssrelax=1 txctcssdefault=71.9 rxctcssfreqs=71.9 txctcssfreqs=71.9 ;rxctcssoverride=0 carrierfrom=dsp ctcssfrom=dsp rxdemod=flat txprelim=yes txlimonly=no txtoctype=notone txmixa=composite txmixb=no invertptt=0 duplex=0 rxondelay=0 rxnoisefiltype=0 eeprom=1
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