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Plenty of bass in TX #2220
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That sounds a problem with the microphone, is it an integrated mic? or external? |
Both Erwin. First I trying to change the electret element in portapack H2M with different types of elements. No success. After that i change the bridge 0 Ohm resistor to make the speaker - mic jack hot. Different external mic also no success. Checking the circuit for some modification to mic input with a lower value capacitor in WM8731 but all ready use a small capacitance of 1nf. No further ideas. |
do external mics sound the same? can you show an example of both? |
I hope to you catch the difference in audio waterfall in video. The first transmission of French guy how look the audio and the second my voice. The bandwidth is 3KHz in SSB. I use an external microphone. As I describe before, no difference or the internal is worse versus to external. Needs middle and high frequencies to fill the bandwidth with audio. vlc-record-2024-08-14-19h25m28s-SDR.Console.v3.3-.mp4 |
Oh strange, clearly does not sound OK. I hope someone here can pitch in with a similar experience, it has not been reported before |
Hi @itaniepitas , can you compare it with previous fw 2.0 (example)? (That one did not had that limitation). If needed , we can add switchable audio BW : 3khz / 6khz , but the ham spectrum spec is < 3khz . Cheers |
Hi |
Ok @itaniepitas , now is clear. As you may know , thanks to the ham colleague ly2ss, we managed to limit and test the Audio SSB TX to 3Khz . Initially I allowed 2k,3k,4k .(n_240707 ) I checked with my Mic (and old apple iPhone headphone -mic set) latest commit and with my Tecsun PL660 the transmitted audio TX SSB audio sound. Quality was quite good . Waiting for your further test. |
Is there any way to fix this problem ? Lots of bass without any treble or hi audio frequencies on TX with any settings. It is almost an unintelligible transmission due to bad muffled audio. Acoustic frequencies not existed above 400 Hz. I believe that a more linearity settings is needed in the voice processing. Unless the problem is with my own device.
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