redbelo Posted August 4, 2019 Share Posted August 4, 2019 what is the diference of S/PDIF and the line out ? I assume S/PDIF is digital , but isent the XLR digital also ? what is the diference ? Quote Link to comment Share on other sites More sharing options...
zolko60 Posted August 4, 2019 Share Posted August 4, 2019 S/PDIF is a protocol. XLR is a connector.. You can send AES/EBU. DMX, analog audio and whatever using XLR equipped cable. Quote Link to comment Share on other sites More sharing options...
redbelo Posted August 4, 2019 Author Share Posted August 4, 2019 my goal here is going from the helix to a TOSlink digital cable , to go to the imput of my APOLLO twin interface , or i am going to need a device in between if i decide to used the digital output ? Quote Link to comment Share on other sites More sharing options...
rd2rk Posted August 4, 2019 Share Posted August 4, 2019 Every time you go from analog to digital or digital to analog there's a conversion (ADC/DAC) from a voltage based signal to a bunch of 0's and 1's or vice versa. Each conversion takes time (latency) and slightly degrades the signal, though whether or not that degradation is perceptible is a topic of some debate. Guitar to Helix = 1 DAC Helix to Line Out (XLR or 1/4") = 1 DAC S/PDIF eliminates that second DAC. FWIW - I can't tell a difference in audio quality, and consider the added latency to be negligible. YMMV. 1 Quote Link to comment Share on other sites More sharing options...
redbelo Posted August 4, 2019 Author Share Posted August 4, 2019 ya 3 minutes ago, rd2rk said: Every time you go from analog to digital or digital to analog there's a conversion (ADC/DAC) from a voltage based signal to a bunch of 0's and 1's or vice versa. Each conversion takes time (latency) and slightly degrades the signal, though whether or not that degradation is perceptible is a topic of some debate. Guitar to Helix = 1 DAC Helix to Line Out (XLR or 1/4") = 1 DAC S/PDIF eliminates that second DAC. FWIW - I can't tell a difference in audio quality, and consider the added latency to be negligible. YMMV. but how i do the connection ? from the coax or xlr to the optical that the APOLLO requires ? Quote Link to comment Share on other sites More sharing options...
rd2rk Posted August 4, 2019 Share Posted August 4, 2019 I think this will work: https://smile.amazon.com/Optical-Converter-Bi-Directional-Repeater-ROOFULL/dp/B01N32C5GT/ref=sr_1_3?crid=28CALEEQG0SDB&keywords=toslink+to+coaxial+converter&qid=1564937368&s=electronics&sprefix=toslink+to+co%2Celectronics%2C177&sr=1-3 You'll also need something like this. NOTE: Although these have RCA connectors, they are different than normal rca audio cables: https://www.amazon.com/AmazonBasics-Digital-Audio-Compatible-Coaxial/dp/B01D5H8UTW/ref=asc_df_B01D5H8UTW/?tag=hyprod-20&linkCode=df0&hvadid=167146065113&hvpos=1o1&hvnetw=g&hvrand=2271279737779331595&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9028780&hvtargid=pla-297381686136&psc=1 I've never needed to do this, as my Scarlett has RCA S/PDIF connectors. You may want to check with Apollo support to verify. They may have a preferred method for the conversion. Quote Link to comment Share on other sites More sharing options...
datacommando Posted August 4, 2019 Share Posted August 4, 2019 3 hours ago, redbelo said: what is the diference of S/PDIF and the line out ? I assume S/PDIF is digital , but isent the XLR digital also ? what is the diference ? You may want to read this if you are not familiar with S/PDIF: https://www.hardwaresecrets.com/everything-you-need-to-know-about-the-spdif-connection/ hope this helps / makes sense. 2 Quote Link to comment Share on other sites More sharing options...
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