Vortan: LOL,ehm... I didn't realize you were broadcasting on FM
What I wanted to do was improve the filtering (FM is stricter) - but if you already had FM enabled that can't be it...
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| Stereo Tool 6.10 https://forums.stereotool.com/viewtopic.php?t=3065 |
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| Author: | eldoradofm [ Wed May 11, 2011 4:58 pm ] |
| Post subject: | Re: Stereo Tool 6.10 |
Quote: - Add lowpass filter for stereo signal (will cause a lot of extra latency!) - it might be possible to avoid this latency using a Hilbert transform
Why is this in lighter color, will this not be added to this version anymore before release?
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| Author: | hvz [ Wed May 11, 2011 5:18 pm ] |
| Post subject: | Re: Stereo Tool 6.10 |
Vortan, could you try this : enable fm, disable pre emphasis. |
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| Author: | Vortan [ Wed May 11, 2011 6:23 pm ] |
| Post subject: | Re: Stereo Tool 6.10 |
Turned on FM transmitter, FM stereo encoder, direct soundcard access, FM transmitter calibration, no pre-emphasis as you said. (edit: beta36) Infos there: current output sample rate: 176400 Hz soundcard supports: 96000 Hz or more FM Stereo pilot tone: Ok, sending FM Stereo signal: Sending to soundcard (probably Ok) FM RDS signal: Off The music seems to be a little louder than without FM, with FM stereo encoder on - the music sounds like mono, of course it isn´t, but i dont know how i should describe... |
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| Author: | eldoradofm [ Wed May 11, 2011 6:49 pm ] |
| Post subject: | Re: Stereo Tool 6.10 |
@vortan What soundcard do you use, does this one have 192 kHz sample rate? If it hasn't than only stereo indicator will light and sound will be mono. Also make sure there's no pre-emphasis turned on on your transmitter if it has any. |
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| Author: | hvz [ Wed May 11, 2011 7:01 pm ] |
| Post subject: | Re: Stereo Tool 6.10 |
Vortan: LOL,ehm... I didn't realize you were broadcasting on FM What I wanted to do was improve the filtering (FM is stricter) - but if you already had FM enabled that can't be it... |
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| Author: | Vortan [ Wed May 11, 2011 7:47 pm ] |
| Post subject: | Re: Stereo Tool 6.10 |
@hvz: No, youre right, i didnt broadcast fm. You asked me "please turn on fm", .. ok i turned it on and i´ve just looked which infos was there and postet that here. Nothing more. 5 minutes after i turned it back off.  @eldoradofm: Its f..king onboard sound, does not support 192khz. Thatswhy it sounds like mono output, now i get it. As i said, i will buy a new soundcard. Any suggestions? |
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| Author: | eldoradofm [ Wed May 11, 2011 10:48 pm ] |
| Post subject: | Re: Stereo Tool 6.10 |
Quote: @eldoradofm: Its f..king onboard sound, does not support 192khz. Thatswhy it sounds like mono output, now i get it. As i said, i will buy a new soundcard. Any suggestions? marian trace alpha is first choice because it has dc straight output. Second choice is esi juli@.
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| Author: | michi95 [ Wed May 11, 2011 11:45 pm ] |
| Post subject: | Re: Stereo Tool 6.10 |
Quote: marian trace alpha is first choice because it has dc straight output. Second choice is esi juli@. Yes, for FM broadcasting !But IMO Vortan doesn't need FM. Quote: @hvz: No, youre right, i didnt broadcast fm. You asked me "please turn on fm", .. ok i turned it on and i´ve just looked which infos was there and postet that here. Nothing more. 5 minutes after i turned it back off.
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| Author: | hvz [ Thu May 12, 2011 2:23 am ] |
| Post subject: | Re: Stereo Tool 6.10 |
Quote: Turned on FM transmitter, FM stereo encoder, direct soundcard access, FM transmitter calibration, no pre-emphasis as you said. (edit: beta36)
Ok, so you're NOT using FM, right?Infos there: current output sample rate: 176400 Hz soundcard supports: 96000 Hz or more FM Stereo pilot tone: Ok, sending FM Stereo signal: Sending to soundcard (probably Ok) FM RDS signal: Off The music seems to be a little louder than without FM, with FM stereo encoder on - the music sounds like mono, of course it isn´t, but i dont know how i should describe... What I'm trying to achieve is the following: In FM mode, the clipping is performed on an unsampled signal - which means that spikes BETWEEN samples get removed. This is better (and mandatory for FM), but it also takes more processing power. It MIGHT solve your sound card issue. To test this, you need to turn FM mode on, but turn ANY FM processing OFF - that includes pre-emphasis, pilot, RDS, Direct Sound Card Output etc. The audio should sound nearly exactly the same (slightly more clipping occurs, so it could be very slightly softer and harsher). If the artifacts that you heard are caused by spikes in between samples, they should be completely gone with this setting though. |
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| Author: | hvz [ Thu May 12, 2011 2:25 am ] |
| Post subject: | Re: Stereo Tool 6.10 |
Quote: Quote: - Add lowpass filter for stereo signal (will cause a lot of extra latency!) - it might be possible to avoid this latency using a Hilbert transform
Why is this in lighter color, will this not be added to this version anymore before release? |
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