Currently Being ModeratedSep 17, 2012 7:43 PM (in response to Doubledashie)Re: signal to noise ratio
Signal-to-noise in general only refers to the analog stages. If the S/R ratio is really bad, you can get drop-outs on digital connections, but you won't get hiss. The DAW connection is digital, and the internals of the HD are mostly digital, so any S/N problems would be before the HD, or after the final analog output. The noise on your recording is not a S/N problem however.
It sounds very much to me like digital clipping. At some point in your chain the signal level is too high. It is very unlikely it is caused by the reverb. Unfortunately, I don't use DAW so I don't know what control there is there over gains (some kind of record level?), but basically I'd look at all places along the chain, both in the HD and in your computer for where you have control over gain/volume and at some point, you will find the signal level is too high.
Currently Being ModeratedSep 18, 2012 7:58 AM (in response to Doubledashie)Re: signal to noise ratio
for clipping inside or around the pod:
also, note that the Line 6 driver control page for USB has a +18 db checkbox that I believe is defaulted to checked. This could push the audio into clipping inside your DAW.
I am not sure about the hissing. If the sample rate didn't match, it would change the pitch of the guitar, not simply degrade the quality. AFAIK. Have you plugged headphones directly into the Pod and verified the patch sounds as you want it before it enters your DAW?
As far as pops and crackles, that's almost always associated with not having a large enough buffer size. Your ASIO driver (I assume this is also on the Line 6 driver control panel) should allow you to adjust the buffer size. However, larger buffers = more latency, and I think they can also degrade some frequencies. When you increase the buffer to the point where there's no more crackle, if you find the latency is unbearable, you have to try to use a lower sample rate.
IMO, USB (unless it's USB 3.0 which the Pod HD does not offer) is no good for audio. It just doesn't have enough bandwidth to reliably transport the data in realtime. I use firewire.
Meambobbo. I fully acknowledge that it is not uncommon for people to hold this opinion, however the basic facts are that USB2 provides pleanty of bandwidth for 2 channel applications (and unless you are using very high bit rates etc, enough for multitack applications too).
Yes, real world thoughput of USB 2 is in the mid 30 MBps, but FW 400 is only in the early 40's (and FW 800 a little less than double that).
I researched this in some detail before I purchased a cheap little ... ahem.. err..... behringer interface. I use this currently on a shared port and have had zero issues (on a pretty old spec computer too).
No arguments from me with your assertion that FW is better, but I would have to contest the suggestion that it is inadequate. What is commonly possible, however, is the use of multiple USB devices on a PC could obviously compromise the situation, wheras few people have multiple FW devices, and therefore are less likely to encounter the same problem.
Currently Being ModeratedSep 19, 2012 9:45 PM (in response to CairnsFella)Re: signal to noise ratio
i have not done as much research as you obviously. i simply speak from experience. however, when i was using USB for my older Line 6 gear, it was on older computers, with a number of other USB devices present. It may have been USB 1.2 for all I know. I always had to allow some latency, or I had issues.
I have super low latency and zero pop/crack issues with my M-Audio Firewire interface using a dedicated Texas Instruments firewire card. I bet if I used a dedicated USB card on a more modern computer, I couldn't tell the difference, but I need the audio interface for other things anyway, and I am happy with its performance. Maybe I'll do more research for my next interface. My newest computer does have USB 3.0 available.