Re: [RDD] ASI Card output level
On Feb 12, 2022, at 23:53, Gavin Stephens wrote: > If RD is playing a test tone at 0dBFS, and the Ref. Level is 0 in Audio > Ports, is the ASI card playing that tone at the maximum rated output level? > Or is it still 6dB down from maximum? > +16 dBm. Cheers! |-| | Frederick F. Gleason, Jr. | Chief Developer | | | Paravel Systems | |-| | A room without books is like a body without a soul. | | | | -- Cicero | |-| ___ Rivendell-dev mailing list Rivendell-dev@lists.rivendellaudio.org http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
Re: [RDD] ASI Card output level
On Feb 12, 2022, at 21:16, Gavin Stephens wrote: > Thanks for that. Still a little confused though. > > From your suggestion, -20dBFS would be -4dBm? > > The maximum I can change this reference level up is by 6. What would it need > to be set at to get +4dBu out of the card from a tone @ -20dBFS? The 1.22V I > got was peak to peak, not RMS. So I'm assuming it has to be set at the > maximum of 6, or does it really need 8? > You would need 8. However, all ASI cards that I’ve tested max out at +6 dB for that mixer setting. If you need more, you’ll have to provide that gain externally (or revert to using the standard Rivendell gain structure, where ‘reference’=-16 dBFS). That gain structure is ‘baked in’ to Rivendell at a pretty fundamental level. Cheers! |-| | Frederick F. Gleason, Jr. | Chief Developer | | | Paravel Systems | |-| | A room without books is like a body without a soul. | | | | -- Cicero | |-| ___ Rivendell-dev mailing list Rivendell-dev@lists.rivendellaudio.org http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
Re: [RDD] ASI Card output level
The easier question I should have asked; If RD is playing a test tone at 0dBFS, and the Ref. Level is 0 in Audio Ports, is the ASI card playing that tone at the maximum rated output level? Or is it still 6dB down from maximum? Thanks, Gavin. On 13/02/2022 3:16 pm, Gavin Stephens wrote: Thanks for that. Still a little confused though. From your suggestion, -20dBFS would be -4dBm? The maximum I can change this reference level up is by 6. What would it need to be set at to get +4dBu out of the card from a tone @ -20dBFS? The 1.22V I got was peak to peak, not RMS. So I'm assuming it has to be set at the maximum of 6, or does it really need 8? Cheers, Gavin. On 13/02/2022 2:31 am, Fred Gleason wrote: On Feb 12, 2022, at 00:49, Gavin Stephens wrote: Under audio ports in rdadmin, what exactly is the ref level setting, or more specifically what does this do? The output on my ASI5111 Rev.F card seems to be a bit low on the RD box. So I decided to plug a multi-meter in to one of the outputs while playing a test file with a 400Hz tone with it's peak at -20dBFS. This card is suppose to output +24dBu max (the Rev.F) so I should be getting a nominal output which I assume would be around 1.228V RMS from that test file. The 'reference level’ (the ‘0’ level on the meters) in Rivendell’s audio files is -16 dBFS. The ‘Ref. Level’ controls in the ‘ASI Audio Ports’ dialog indicate the level (in dBm) of a steady-state tone recorded at the reference level on an analog ASI card output. Cheers! |-| | Frederick F. Gleason, Jr. | Chief Developer | | | Paravel Systems | |-| | A room without books is like a body without a soul. | | | | -- Cicero | |-| ___ Rivendell-dev mailing list Rivendell-dev@lists.rivendellaudio.org http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ Rivendell-dev mailing list Rivendell-dev@lists.rivendellaudio.org http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
Re: [RDD] ASI Card output level
Thanks for that. Still a little confused though. From your suggestion, -20dBFS would be -4dBm? The maximum I can change this reference level up is by 6. What would it need to be set at to get +4dBu out of the card from a tone @ -20dBFS? The 1.22V I got was peak to peak, not RMS. So I'm assuming it has to be set at the maximum of 6, or does it really need 8? Cheers, Gavin. On 13/02/2022 2:31 am, Fred Gleason wrote: On Feb 12, 2022, at 00:49, Gavin Stephens wrote: Under audio ports in rdadmin, what exactly is the ref level setting, or more specifically what does this do? The output on my ASI5111 Rev.F card seems to be a bit low on the RD box. So I decided to plug a multi-meter in to one of the outputs while playing a test file with a 400Hz tone with it's peak at -20dBFS. This card is suppose to output +24dBu max (the Rev.F) so I should be getting a nominal output which I assume would be around 1.228V RMS from that test file. The 'reference level’ (the ‘0’ level on the meters) in Rivendell’s audio files is -16 dBFS. The ‘Ref. Level’ controls in the ‘ASI Audio Ports’ dialog indicate the level (in dBm) of a steady-state tone recorded at the reference level on an analog ASI card output. Cheers! |-| | Frederick F. Gleason, Jr. | Chief Developer | | | Paravel Systems | |-| | A room without books is like a body without a soul. | | | | -- Cicero | |-| ___ Rivendell-dev mailing list Rivendell-dev@lists.rivendellaudio.org http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ Rivendell-dev mailing list Rivendell-dev@lists.rivendellaudio.org http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
Re: [RDD] ASI Card output level
On Feb 12, 2022, at 00:49, Gavin Stephens wrote: > Under audio ports in rdadmin, what exactly is the ref level setting, or more > specifically what does this do? > > The output on my ASI5111 Rev.F card seems to be a bit low on the RD box. So I > decided to plug a multi-meter in to one of the outputs while playing a test > file with a 400Hz tone with it's peak at -20dBFS. This card is suppose to > output +24dBu max (the Rev.F) so I should be getting a nominal output which I > assume would be around 1.228V RMS from that test file. The 'reference level’ (the ‘0’ level on the meters) in Rivendell’s audio files is -16 dBFS. The ‘Ref. Level’ controls in the ‘ASI Audio Ports’ dialog indicate the level (in dBm) of a steady-state tone recorded at the reference level on an analog ASI card output. Cheers! |-| | Frederick F. Gleason, Jr. | Chief Developer | | | Paravel Systems | |-| | A room without books is like a body without a soul. | | | | -- Cicero | |-|___ Rivendell-dev mailing list Rivendell-dev@lists.rivendellaudio.org http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
Re: [RDD] ASI Card output level
I found some answers to one of the issues. 15 minutes later the probe was a bit scratchy, gave it a good thump then it went up higher in voltage (time for a new probe). Just a coincidence the multi-meter was also in the 5xxmV reading range to start with ( I double checked this, still reports it as 560mV). Restarted the RD box after changing the ref. level to 4, and then the voltage was 1.22V as expected on the scope. I'm not entirely sure though why the ref. level has to be 4 instead of 0 for that, I would have thought if the max output from the card is suppose to be +24dBu then I should be seeing 1.22V by default of 0? Or does the ref. level have some other internal tricks within RD or the HPI it's doing not just simply raising the output level gain? Cheers, Gavin. On 12/02/2022 6:49 pm, Gavin Stephens wrote: Afternoon. Just a couple of question regarding an ASI configuration. Under audio ports in rdadmin, what exactly is the ref level setting, or more specifically what does this do? The output on my ASI5111 Rev.F card seems to be a bit low on the RD box. So I decided to plug a multi-meter in to one of the outputs while playing a test file with a 400Hz tone with it's peak at -20dBFS. This card is suppose to output +24dBu max (the Rev.F) so I should be getting a nominal output which I assume would be around 1.228V RMS from that test file. However, I'm only getting around 260mV between the GND and hot pins. When I short cold to GND and re-measure I get 500mV or so, same between hot and cold. I thought maybe this is the RMS detection in my multi-meter so I decided to pull the scope out instead. The scope also measures the same voltage peak to peak. This tells me the RMS detection in the multi-meter is still sus' since it's the same peak reading as the scope, but the scope confirms it's still not over 1 volt. Any idea why this level is a little on the low side? I remember in the ASI control panel on the old Windows box I had to go in and change the default max playback level setting from +14dBu to +24dBu after the driver was installed or it was a little on the quiet side. I assume this has absolutely nothing to do with how it's handled in RD with the Audioscience driver and it just runs at it's maximum from the get go? That's why I went looking in the audio ports and came across the ref level setting, but changing this from 0 to 4 didn't seem to alter a single thing on the output of the card. I only bothered to check this, because an audio interface upstream that's only suppose to support a max input of about +19dBu isn't on it's minimum gain setting to get -20dBFS as a reference for the signal I'm sending it. This implied to me the output was a bit low coming from the ASI5111 in RD, hence out came the multi-meter then scope to try and figure out what's up. Cheers, Gavin. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ Rivendell-dev mailing list Rivendell-dev@lists.rivendellaudio.org http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
[RDD] ASI Card output level
Afternoon. Just a couple of question regarding an ASI configuration. Under audio ports in rdadmin, what exactly is the ref level setting, or more specifically what does this do? The output on my ASI5111 Rev.F card seems to be a bit low on the RD box. So I decided to plug a multi-meter in to one of the outputs while playing a test file with a 400Hz tone with it's peak at -20dBFS. This card is suppose to output +24dBu max (the Rev.F) so I should be getting a nominal output which I assume would be around 1.228V RMS from that test file. However, I'm only getting around 260mV between the GND and hot pins. When I short cold to GND and re-measure I get 500mV or so, same between hot and cold. I thought maybe this is the RMS detection in my multi-meter so I decided to pull the scope out instead. The scope also measures the same voltage peak to peak. This tells me the RMS detection in the multi-meter is still sus' since it's the same peak reading as the scope, but the scope confirms it's still not over 1 volt. Any idea why this level is a little on the low side? I remember in the ASI control panel on the old Windows box I had to go in and change the default max playback level setting from +14dBu to +24dBu after the driver was installed or it was a little on the quiet side. I assume this has absolutely nothing to do with how it's handled in RD with the Audioscience driver and it just runs at it's maximum from the get go? That's why I went looking in the audio ports and came across the ref level setting, but changing this from 0 to 4 didn't seem to alter a single thing on the output of the card. I only bothered to check this, because an audio interface upstream that's only suppose to support a max input of about +19dBu isn't on it's minimum gain setting to get -20dBFS as a reference for the signal I'm sending it. This implied to me the output was a bit low coming from the ASI5111 in RD, hence out came the multi-meter then scope to try and figure out what's up. Cheers, Gavin. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ Rivendell-dev mailing list Rivendell-dev@lists.rivendellaudio.org http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
