dpstjp2 Posted February 26, 2018 Share Posted February 26, 2018 There you go: Home Theater Review Link to comment
Ralf11 Posted February 26, 2018 Share Posted February 26, 2018 my dog is above average he likes software Link to comment
FredericV Posted February 26, 2018 Share Posted February 26, 2018 There are probably more DTS CD's than MQA-CD's .... which is to my surprise quite large:http://www.surrounddiscography.com/dts/dtsdisc.htm 3 google hits for MQA-CD on bol.com which is targeted to Belgium & The Netherlands: 0 hits on amazon.fr only 1 hit on amazon.com 3 hits on amazon.de This one is interesting:https://www.amazon.de/Inside-Moment-Mqa-CD-Camille-Thurman/dp/B06ZZ6GTBV Quote MQA ist eine preisgekrönte Technologie, die den Klang des Studios liefert. MQA-CDs sind vollständig kompatibel und laufen auf jedem CD-Player in normaler CD-Auflösung. Wird der Player an einen MQA-tauglichen DAC angeschlossen, entfaltet dieser die volle Auflösung von bis zu 352 kHz. The description is again misleading. MQA can't do 352.8 Khz content (but it can do upsampling of the first unfold to 352.8 Khz). "Auflösung" means resolution, so the description is certainly misleading. The first unfold when the 24 bit MQA file has been stripped to 16 bits does not happen, except for some fake content because of their leaky upsampling with aliasing. Will MQA-CD be a different beast with a different bit allocation, or does it behave like a truncated 24 bit MQA file to 16 bits? If MQA would change "resolution" to "upsample resolution", it would reflect the truth in case claimed resolution is higher than 24/96 or 24/88.2. Now it's false advertising. MikeyFresh 1 Designer of the 432 EVO music server and Linux specialist Discoverer of the independent open source sox based mqa playback method with optional one cycle postringing. Link to comment
testikoff Posted March 6, 2018 Share Posted March 6, 2018 Here is the mqascan result of Reich: Pulse/Quartet (2018) MQA-encoded CD: ===== [01] Pulse.flac ===== 0000ac38: MQA signature at bit 8 0000ac38: [5] datasync magic 36: 0x11319207d stream_pos_flag 1: 0 pad 1: 1 orig_rate 5: 0x01 [88.1 KHz] src_rate 5: 0x00 [44.1 kHz] render_filter 5: 4 unknown_1 5: 0x08 unknown_2 1: 0 pad 2: 0 mqa_level 8: 0x40 items 7: 2 size 8: 0x14 size 8: 0x0b type 8: 0x00 type 8: 0x01 [type 0] unknown_3 2: 2 unknown_4 4: 0 unknown_5 7: 15 unknown_6 7: 127 [type 1] unknown_7 11: 0x259 checksum 4: 0xc ===== [02] Quartet - 1. Fast.flac ===== 00005bba: MQA signature at bit 8 00005bba: [5] datasync magic 36: 0x11319207d stream_pos_flag 1: 1 pad 1: 1 orig_rate 5: 0x01 [88.1 KHz] src_rate 5: 0x00 [44.1 kHz] render_filter 5: 4 unknown_1 5: 0x08 unknown_2 1: 0 pad 2: 0 mqa_level 8: 0x40 items 7: 2 size 8: 0xc2 size 8: 0x20 type 8: 0x00 type 8: 0x01 stream_position 32: 0x00003e06 [type 0] unknown_3 2: 2 unknown_4 4: 0 unknown_5 7: 15 unknown_6 7: 127 start_offset 27: 0x0000200 pad 1: 0 data 146: [skipped] [type 1] unknown_7 32: 0x080ffa59 checksum 4: 0xf ===== [03] Quartet - 2. Slow.flac ===== 00000908: MQA signature at bit 8 00000908: [5] datasync magic 36: 0x11319207d stream_pos_flag 1: 0 pad 1: 1 orig_rate 5: 0x01 [88.1 KHz] src_rate 5: 0x00 [44.1 kHz] render_filter 5: 4 unknown_1 5: 0x08 unknown_2 1: 0 pad 2: 0 mqa_level 8: 0x40 items 7: 2 size 8: 0x14 size 8: 0x0b type 8: 0x00 type 8: 0x01 [type 0] unknown_3 2: 2 unknown_4 4: 0 unknown_5 7: 15 unknown_6 7: 127 [type 1] unknown_7 11: 0x259 checksum 4: 0xc ===== [04] Quartet - 3. Fast.flac ===== 00000908: MQA signature at bit 8 00000908: [5] datasync magic 36: 0x11319207d stream_pos_flag 1: 0 pad 1: 1 orig_rate 5: 0x01 [88.1 KHz] src_rate 5: 0x00 [44.1 kHz] render_filter 5: 4 unknown_1 5: 0x08 unknown_2 1: 0 pad 2: 0 mqa_level 8: 0x40 items 7: 2 size 8: 0x14 size 8: 0x0b type 8: 0x00 type 8: 0x01 [type 0] unknown_3 2: 2 unknown_4 4: 0 unknown_5 7: 15 unknown_6 7: 127 [type 1] unknown_7 11: 0x259 checksum 4: 0xc Link to comment
testikoff Posted March 7, 2018 Share Posted March 7, 2018 ^^^ BTW, the MQA light that comes up on my Explorer2 DAC when the above CD plays is green (not blue)... Link to comment
mansr Posted March 7, 2018 Share Posted March 7, 2018 Thanks for posting that. Firstly, we see that the MQA control stream is in bit 8, which is counted as though it were a 24-bit file. In other words, it is in the LSB of the 16-bit CD data. That means there is no high-frequency content to be decoded here. Curiously, the MQA signature is not found at the start of the track but some distance in as indicated by the sample number printed at the start of the line. Even more odd is that the packet printed for track 2 is not the first in an MQA stream as evidenced by the presence of the 'stream_position' field which indicates the offset in samples from the start of the track to the start of this packet. Curiouser and curiouser. Finally, note the 'mqa_level' value. This controls the indicator colour. Blue tracks have a value of 0x90 rather than the 0x40 seen here. Unfortunately, I don't know the exact meaning of this value. Link to comment
testikoff Posted March 7, 2018 Share Posted March 7, 2018 ^^^ As per Explorer2 manual, DAC's green light means MQA, blue - MQA Studio Link to comment
testikoff Posted March 16, 2018 Share Posted March 16, 2018 A FLAC snippet of track 01 Pulse taken off Reich: Pulse/Quartet MQA-encoded CD... rando 1 Link to comment
jacobacci Posted April 4, 2018 Share Posted April 4, 2018 Hi all interesting thread ....... I would like to hear the difference myself. I do have an MQA capable DAC. Maybe I missed it .. where can I purchase the 24/48 MQA version of the Steve Reich / Pulse, Quartet album? Where can I purchase the MQA encoded CD? Thanks Link to comment
testikoff Posted April 11, 2018 Share Posted April 11, 2018 Universal Music Japan is preparing 100 MQA-encoded CD titles for June 20, 2018 release. Link to comment
james45974 Posted April 11, 2018 Share Posted April 11, 2018 3 minutes ago, testikoff said: Universal Music Japan is preparing 100 MQA-encoded CD titles for release... it's too late for an April Fools' Day joke! Jim Link to comment
FredericV Posted April 11, 2018 Share Posted April 11, 2018 MQA CD is not highres On 3/16/2018 at 3:22 PM, testikoff said: A FLAC snippet of track 01 Pulse taken off Reich: Pulse/Quartet MQA-encoded CD... MQA CD 16/44.1, undecoded MQA CD decoded to 88.2K, twice the bins needed (otherwise the plot looks competely different), no highres part added, no ultrasonics added, just some garbage at 24 Khz below the treshold of human hearing (probably some aliasing due to their leaky filters): Designer of the 432 EVO music server and Linux specialist Discoverer of the independent open source sox based mqa playback method with optional one cycle postringing. Link to comment
adamdea Posted April 11, 2018 Share Posted April 11, 2018 11 minutes ago, FredericV said: MQA CD is not highres MQA CD 16/44.1, undecoded MQA CD decoded to 88.2K, twice the bins needed (otherwise the plot looks competely different), no highres part added, no ultrasonics added, just some garbage at 24 Khz below the treshold of human hearing (probably some aliasing due to their leaky filters): Have you set audacity to 145dB scale? You are not a sound quality measurement device Link to comment
FredericV Posted April 11, 2018 Share Posted April 11, 2018 14 minutes ago, adamdea said: Have you set audacity to 145dB scale? The main issue here is that we don't have the original true 24 bit files to compare with. So going to compare their leaky upsampler with our sox config, and see if the aliasing overlaps. Putting the scale to 24 bit is no issue. Coming back on this post, based on earlier truncation experiments: Designer of the 432 EVO music server and Linux specialist Discoverer of the independent open source sox based mqa playback method with optional one cycle postringing. Link to comment
adamdea Posted April 11, 2018 Share Posted April 11, 2018 5 minutes ago, FredericV said: The main issue here is that we don't have the original true 24 bit files to compare with. So going to compare their leaky upsampler with our sox config, and see if the aliasing overlaps. Putting the scale to 24 bit is no issue. Coming back on this post, based on earlier truncation experiments: I think we could up the FFT resolution too. You are not a sound quality measurement device Link to comment
Brinkman Ship Posted April 11, 2018 Author Share Posted April 11, 2018 5 minutes ago, FredericV said: The main issue here is that we don't have the original true 24 bit files to compare with. So going to compare their leaky upsampler with our sox config, and see if the aliasing overlaps. Putting the scale to 24 bit is no issue. Coming back on this post, based on earlier truncation experiments: I work with Japanese companies closely in my line work, and I have a decent understanding of the culture..they are early adapters...and MQA is clearly try to bank on this, hoping for some minor interest.. For those of us who missed it..just HOW do you play an MQA CD? Do you have to have a transport with a USB output? Link to comment
mansr Posted April 11, 2018 Share Posted April 11, 2018 11 minutes ago, Brinkman Ship said: For those of us who missed it..just HOW do you play an MQA CD? Do you have to have a transport with a USB output? Or a DAC that decodes MQA from S/PDIF. I think the Mytek ones do. Link to comment
Brinkman Ship Posted April 11, 2018 Author Share Posted April 11, 2018 8 minutes ago, mansr said: Or a DAC that decodes MQA from S/PDIF. I think the Mytek ones do. I thought that might be it..but for some reason I thought MQA was not compatible with S/PDIF.. So you have to purchase a MyTek DAC to get any "benefit". Lovely. I'm ordering all 100 MQA CDs and a MyTek. Link to comment
mansr Posted April 11, 2018 Share Posted April 11, 2018 6 minutes ago, Brinkman Ship said: I thought that might be it..but for some reason I though MQA was not compatible with S/PDIF.. It depends on the signal routing. Some DACs use an XMOS or other powerful processor only for USB input and a simple S/PDIF decoder chip feeding the DAC directly. Such designs can't support MQA on inputs that don't go through the processor. Link to comment
FredericV Posted April 11, 2018 Share Posted April 11, 2018 39 minutes ago, Brinkman Ship said: I thought that might be it..but for some reason I thought MQA was not compatible with S/PDIF.. The output of the renderer is not supported via SPDIF. So digital outputs from a device decoding MQA will always be limited to 24/88.2 or 24/96. The core decoding aka first unfold. But SPDIF can carry the 16 or 24 bit distribution files bitperfect (e.g. streamer playing 24 bit distribution file, or redbook transport playing 16 bit truncated file with MQA ), which an MQA dac with MQA enabled SPDIF input, can decode. Designer of the 432 EVO music server and Linux specialist Discoverer of the independent open source sox based mqa playback method with optional one cycle postringing. Link to comment
crenca Posted April 11, 2018 Share Posted April 11, 2018 2 hours ago, testikoff said: Universal Music Japan is preparing 100 MQA-encoded CD titles for June 20, 2018 release. 100? Vaporware. Even as a niche player they will have to do much much more. How many titles released every year in SACD? Hey MQA, if it is not all $voodoo$, show us the math! Link to comment
testikoff Posted September 24, 2018 Share Posted September 24, 2018 Can anyone comment on contents of Bob's recent posts specifically in regard to MQA CDs? http://www.bobtalks.co.uk/2018/09/ Link to comment
mansr Posted September 24, 2018 Share Posted September 24, 2018 57 minutes ago, testikoff said: Can anyone comment on contents of Bob's recent posts specifically in regard to MQA CDs? http://www.bobtalks.co.uk/2018/09/ Without reading it: utter tripe. Link to comment
Ralf11 Posted September 24, 2018 Share Posted September 24, 2018 4 hours ago, mansr said: Without reading it: utter tripe. https://www.leparfait.com/recipe/french-tripes-a-la-lyonnaise_419#page/1 Link to comment
Hugo9000 Posted September 24, 2018 Share Posted September 24, 2018 1 hour ago, Ralf11 said: https://www.leparfait.com/recipe/french-tripes-a-la-lyonnaise_419#page/1 ??☠️ 请教别人一次是5分钟的傻子，从不请教别人是一辈子的傻子 Link to comment
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