- May 2, 2018 at 7:57 pm #10272staticParticipant
Total posts : 1
Thank you for your attention. I am a humble broadcaster relaying low quality underdeveloped-country internet radio received via a mere DSL connection. The TX is just the Scosche, powered by 2 D-cell batteries. I like to send the internet radio to my mp3 player-radio on headphones and to several fm radios around the house.
So, rather obviously I have Gi-Ga setup with the rather poor quality stream, complicated by primitive receivers (although one is, to me, very pleasing–the Tecsun et-310).
My expectations are not sky-high. I am pretty pleased with this lash-up, but I seek your advice about any inexpensive improvement. I do split the output from the computer into the speakers, as well as into the tx. I have added ferrites to the lines to control hum, and overabundant radiation.
I like the idea of using a cheap usb dac in line, however I realize this may futher expose the deficiencies in the many weak links in my setup. I would hope though, that it could help the speaker split.
I would love to hear if any of you have an idea that could perhaps improve my setup, other than better internet service.
Thank you for your time, and knowledge. My apologies if this has been covered many times here, this sudden rush of enthusiasm of gadget shopping has blinded me to propriety.
hee is the simple dac I am interested in
HiFiMeDIY Sabre USB DAC Digital to Analog Audio Converter 96khz/24bit ES9023+SA9023 + USB to Optical Converter
StaticMay 28, 2018 at 12:07 am #76442KevtronicsParticipant
Total posts : 9
With low-quality Internet audio sources, sometimes it’s helpful to use an equalizer to reduce the high treble frequencies, as they’re likely to be mostly just noise and digital compression artifacts.May 28, 2018 at 11:41 am #76471Carl BlareParticipant
Total posts : 1540
Note to Artisan Radio
As I understand it static is not sending an internet stream
He is receiving an incoming stream from another broadcaster and wants to rebroadcast it on his Scosche FM Transmitter with decent quality.
I have asked static to supply more detailed information and if he does so we can give better answers.May 28, 2018 at 12:13 pm #76460Carl BlareParticipant
Total posts : 1540
Rebroadcasting from Internet Audio –
static, there is some information you did not mention which plays a role in the result you will get.
– The download speed of your DSL;
– Computer description including CPU speed, amount of RAM;
– Software used to access the stream and send it to your computer’s audio output;
– stream address of the radio station so we can evaluate it and make better recommendations.
Passing the signal through a good software compressor/limiter can very much improve the audio for your transmitter.
There are several models of Scosche transmitter… which one do you have?
I am familiar with Scosche FMTR and recommend a modification which will improve performance… as it comes from the factory the RF antenna output is attached to the shield wire in the audio cable… the antenna output can be made separate for better control of signal radiation. Great care must be taken to comply with FCC 15.239.
The TECSUN PL310ET is a remarkable radio.May 28, 2018 at 3:17 pm #76466Part 15 EngineerParticipant
Total posts : 165
well the best way for internet radio or any radio to work right and sound good is to eliminate as much D/A-A/D conversion by as much as possible. keeping the audio paths digital right up to the streaming encoder and keeping them digital from the receiving end of the stream all the way up to the transmitter and starting with uncompressed wav at the source. that is how most professional program providers / webcaster’s and local broadcasts / rebroadcast’s are done in this day and age.
if i had the $$$ i would go with an all digital path / air chain (AoIP or AES/EBU) right up to my transmitters. i know this is not practical for us low power hobbyist but that is how it should be done and if i had a full power licensed station that is how i would do everything in the studio / air chain.May 28, 2018 at 5:03 pm #76467ArtisanRadioParticipant
Total posts : 526
Perhaps the best way would be to have an all analog chain to your over-the-air transmitter (eliminating an intervening computer), and feed a single computer dedicated to taking in the analog feed, generating the internet stream, and sending it out.
Of course, that doesn’t work for a single person Part 15 operation.
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