reaper60
Sensei
Music Makes Me Happy!
Posts: 505
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Post by reaper60 on Aug 30, 2014 20:40:33 GMT -5
I had a random audio volume change this week. Was watching TV and switching between a football game and a Jeff Dunham comedy show at commercial breaks. When I switched channels I had to check for mute because I heard next to no sound,... I cranked the volume up,... And it was there but appeared very veiled and thin. I changed the channel and all was back to normal. I went back to the previous channel again, no problems. Very odd.
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Post by Mike Ronesia on Aug 30, 2014 21:21:44 GMT -5
Our sound coming out of the apple tv when watching HULU seems to be corrupt at times. It's soft and garbled. I haven't done any analyses yet, but it wasn't an issue with the UMC-1. Netflix through the apple has not been a problem, nor has anything through the Oppo.
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Post by doc1963 on Aug 30, 2014 22:43:12 GMT -5
This is a display bug and has been reported. Emotiva is aware and it will be fixed in the next firmware release. Seems the display "never" reports anything other than "24 bit" resolution, but the sampling frequency report is accurate. That is not entirely true, as I have seen numerous audio streams, from my Dish receiver for instance, that are reported as 16 bit. Hmmm... Odd. I've not noticed mine report anything other than 24 bit regardless of source. Others have reported the same issue. Funny thing is that these are sources (and source material) that I know for a fact worked flawlessly with both my UMC-200 and DC-1. The problem isn't the source, but we'll wait to see what the next firmware brings to the table. Until then, I'll ignore the display….. EDIT: viper6 is correct. I just noticed that the XMC-1 is reporting 16/48 from my FIOS STB. ALL other sources are reporting as 24 bit. |
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riscy
Minor Hero
Posts: 28
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Post by riscy on Aug 31, 2014 2:08:04 GMT -5
OK The HDMI does not support or if it does its not telling it like it is...  Also after a full non pass thru shutdown for say 12 hours when I turn everything back on (no triggers) my amps on first I get a massive THUMP out the speakers as the XMC comes live....any ideas? Anyone else get this? I have also experienced some thumping. Though, I was having trigger problems. Every other time I got my enter channel amp to turn on, it would thump like mad. Haven't had the issue since, though. |
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riscy
Minor Hero
Posts: 28
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Post by riscy on Aug 31, 2014 2:24:02 GMT -5
I think Lonnie's point was that this happens on the UPA line, not the XPA line. It happens on both the XPA and UPA series... I have XPA-1s and the problem occurs. It is now fixed by use of the "modified" trigger cable. Is happening with my XPR-5 as well. My XPR-1s work just fine, though. FWIW... |
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Post by doc1963 on Aug 31, 2014 17:23:04 GMT -5
This is a display bug and has been reported. Emotiva is aware and it will be fixed in the next firmware release. Seems the display "never" reports anything other than "24 bit" resolution, but the sampling frequency report is accurate. That is not entirely true, as I have seen numerous audio streams, from my Dish receiver for instance, that are reported as 16 bit. : viper6 is correct. I just noticed that the XMC-1 is reporting 16/48 from my FIOS STB. ALL other sources are reporting input as 24 bit (including sources that I know are 16 bit). So… this means that the XMC-1 is either "padding" the data or it is a bug. |
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bootman
Emo VIPs 
Typing useless posts on internet forums....
Posts: 9,358
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Post by bootman on Aug 31, 2014 17:27:38 GMT -5
: viper6 is correct. I just noticed that the XMC-1 is reporting 16/48 from my FIOS STB. ALL other sources are reporting input as 24 bit (including sources that I know are 16 bit). So… this means that the XMC-1 is either "padding" the data or it is a bug. Either way it's a bug.  |
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Post by foggy1956 on Aug 31, 2014 18:25:14 GMT -5
Haven't seen this one yet. Cable input set to all channel stereo for 2.0 sources still often plays them in plxII mode.
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bootman
Emo VIPs
Typing useless posts on internet forums....
Posts: 9,358
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Post by bootman on Aug 31, 2014 18:28:42 GMT -5
Haven't seen this one yet. Cable input set to all channel stereo for 2.0 sources still often plays them in plxII mode. This is verified via the OSD? |
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Post by foggy1956 on Aug 31, 2014 18:30:30 GMT -5
Haven't seen this one yet. Cable input set to all channel stereo for 2.0 sources still often plays them in plxII mode. This is verified via the OSD? Yes |
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Post by wizardofoz on Aug 31, 2014 23:29:28 GMT -5
I swear my OLED screen went off and then on like a brown out in the corner of my eye last night.
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Post by bluescale on Sept 1, 2014 7:49:54 GMT -5
Okay, I did some measuring of the signal output from the XMC-1 directly into my sound card. Something is afoot with All Stereo Mode: Here's an image of multiple measurements of a white noise test tone. I matched the subwoofer measurement color to the left channel measurement color so different sound modes can easily be spotted. You'll see why in the next message. Modes included in this image are Stereo, Direct and PLIIx:  Everything here looks exactly as we'd expect. All the left channel measurements are the same, and all the sub channel measurements are the same. Now, see what happens when I add the measurement for the All Stereo Mode (pink, if you couldn't tell at a glance):  The left channel is down about 2dB, with a steeper roll off, while the sub is up about 5dB. I measured my speakers configured for 5.1 with 5.1 actually connected, 5.1. with only 2.0 connected, and 2.0 with 2.0 connected. Same behavior regardless. I'm going to go through this battery of tests again tomorrow, just to make sure that tiredness hasn't caused any errors on my part. At this moment, however, All Stereo mode looks broken to me. |
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Post by bitzerjdb on Sept 2, 2014 10:37:15 GMT -5
Not sure if this is a bug or not....but when listening to my Squeezebox V3 (Coax Digital, with FLAC as a source)at the beginning of every song I can hear the relays clicking. My "Mode" is set to Stereo...
It also seems to clip off the first second or two of the song.
FYI - This did not happen with the UMC-200.
Second issue...I'm getting some interference in the data stream, this manifests itself as a screech during playback. If I rewind, the noise is not there. I need to debug this one a bit more. Again, it didn't happen at all with the UMC-200, it started when the XMC-1 was installed.
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Post by doc1963 on Sept 2, 2014 15:26:56 GMT -5
Not sure if this is a bug or not....but when listening to my Squeezebox V3 (Coax Digital, with FLAC as a source)at the beginning of every song I can hear the relays clicking. My "Mode" is set to Stereo... It also seems to clip off the first second or two of the song. I've noticed this as well... |
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Post by bluescale on Sept 3, 2014 0:33:34 GMT -5
Not sure if this is a bug or not....but when listening to my Squeezebox V3 (Coax Digital, with FLAC as a source)at the beginning of every song I can hear the relays clicking. My "Mode" is set to Stereo... It also seems to clip off the first second or two of the song. I've noticed this as well... I don't use the XMC-1 for music, since I have a separate 2 channel system, but I decided to give this a try. Since I use JRiver on my HTPC, it was easy enough for my to map to my audio files and play a few tracks. The first track I played cut off the tiniest bit of music. After that, the signal stayed locked on, even when I skipped songs, or played something from a different directory. I changed audio modes on the XMC-1, and the first track I play again had a tiny bit cut off. After that, the signal stayed locked. These were flac's and they were streaming, so it should have been a similar experience to the squeezebox. |
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Post by bluescale on Sept 3, 2014 4:25:40 GMT -5
The other night, when I posted about the All Stereo defect, I was pretty tired, and didn't test as systematically as I would have liked, or presented the information as clearly as possible. With that in mind, I went back and retested. Per Roger Dressler's ( srrndhound) suggestion I used swept sine waves generated by REW, rather than white noise from an mp3 file. There's a problem with inconsistent levels (i.e., voltage is different in different modes) and incorrect sub level for All Stereo mode: Surround Mode:  Direct Mode:  Stereo Mode (both main channel and sub are about 6dB hotter):  All Stereo Mode (main channel is normal, sub channel is 6dB hotter):  For those who don't know how to interpret what these images are showing, the left axis shows dB, while the bottom axis shows the frequency response. The line that starts higher on the left and starts sloping down around 70Hz is the sub signal. The line that start low on the left rises sharply until around 100hZ is the main channel (in this case, the left channel). |
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Post by Chuck Elliot on Sept 3, 2014 8:32:26 GMT -5
The other night, when I posted about the All Stereo defect, I was pretty tired, and didn't test as systematically as I would have liked, or presented the information as clearly as possible. With that in mind, I went back and retested. Per Roger Dressler's ( srrndhound) suggestion I used swept sine waves generated by REW, rather than white noise from an mp3 file. There's a problem with inconsistent levels (i.e., voltage is different in different modes) and incorrect sub level for All Stereo mode: Looking at the graphs it appears the the low-pass slope is 24dB and the high-pass is 12 dB. Is this the way you were set up? |
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Post by bluescale on Sept 3, 2014 8:40:21 GMT -5
The other night, when I posted about the All Stereo defect, I was pretty tired, and didn't test as systematically as I would have liked, or presented the information as clearly as possible. With that in mind, I went back and retested. Per Roger Dressler's ( srrndhound) suggestion I used swept sine waves generated by REW, rather than white noise from an mp3 file. There's a problem with inconsistent levels (i.e., voltage is different in different modes) and incorrect sub level for All Stereo mode: Looking at the graphs it appears the the low-pass slope is 24dB and the high-pass is 12 dB. Is this the way you were set up? The low pass filter slope is configurable. The high pass is not. |
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Post by TheTerrorBeyond on Sept 3, 2014 22:19:32 GMT -5
I just set up my XMC-1 and have found a few peculiarities, but the one that bears mentioning is the IP address issue. I found that the unit will not pull an IP address with DHCP set with an "X" in the box, turning it on. The IP comes up with incorrect information when set this way:
Subnet: 255.0.0.0
IP: 62.0.0.0
DHCP: X
DNS 1: 8.8.8.8
DNS 2: 208.67.222.222
Gateway: 0.0.0.0
When I remove the "X" from DHCP, I get the proper IP, subnet, gateway, etc. If I have the IP set and then check DHCP with an "X" in the box, the IP stays the same until I move the cursor (or whatever you would call it) back to the DHCP menu selection, at which time the settings revert back to the wrong numbers.
By the way, the XMC-1 set the IP and everything via DHCP after I told it not to do so. This is okay, as I have an IP address, but this is something that might need to be addressed.
Mind you, I never entered any numbers manually at all, so I know that the XMC-1 is getting the network information from the DHCP server. It appears that the checkbox is backwards or something. :\
Link to the video showing the issue: youtu.be/JyE8Fc1_dFw
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Post by doc1963 on Sept 3, 2014 22:29:47 GMT -5
I've noticed this as well... I don't use the XMC-1 for music, since I have a separate 2 channel system, but I decided to give this a try. Since I use JRiver on my HTPC, it was easy enough for my to map to my audio files and play a few tracks. The first track I played cut off the tiniest bit of music. After that, the signal stayed locked on, even when I skipped songs, or played something from a different directory. I changed audio modes on the XMC-1, and the first track I play again had a tiny bit cut off. After that, the signal stayed locked. These were flac's and they were streaming, so it should have been a similar experience to the squeezebox. I use Audirvana from a Mac Mini which loads each song to RAM for playback. My experience is the same as yours in as much as the XMC-1 cutting off the first half second as you start the initial playback, but that's where our similarity ends. The XMC-1 will stay locked if I let the USB stream play through, but if I skip around, the problem is still there. It's certainly not the worst I've seen, but it is annoying once you realize it's there. If anyone wants to test the issue, pick tracks that open hard on the "zero" count. The fist half second will be missing. Play the same tracks through an analog input and it's all there… I have my ERC-2 connected to my XMC-1 two ways. A direct digital connection (via AES/ESB) and also an analog feed (via the ERC-2's balanced outputs) to the "reference" balanced inputs of the XMC-1. To prove this issue to myself, I put in a CD with tracks that I knew opened hard and fast and made direct comparisons by simply switching the inputs and replaying the track. Every selected track played through the digital input exhibited the loss of the first half second. The same track played flawlessly from the ERC-2 using the analog inputs. Now… this includes both manually skipping tracks and letting the entire disc play through. Yes, event the natural "track change" of the tracks on these CDs showed the issue (but, again, not via analog). Keep in mind, however, that if a track doesn't open on the "zero" count, but rather on the "one" or "two" second count (which means the track opening is "padded"), you will not notice this issue as the stream will open with digital silence. The mode will lock onto that. Given that my XMC-1 is programmed that the default modes for both Surround and 2.0 (for all of my 2.0 digital inputs) should be "Stereo", what is it looking that would interrupt the stream…  I, for one, certainly hope this gets looked at…..  EDIT: And I agree with bitzerjdb… this didn't occur with my UMC-200 (that I remember) or my DC-1. |
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