ABX Testing: 128k AAC vs Lossless скачать в хорошем качестве

ABX Testing: 128k AAC vs Lossless

We conduct an ABX test between 128k AAC and lossless! ● WHAT IS ABX TESTING?    • Lossless vs. Lossy (Part 2: ABX Testing)   ● See below for equipment and software used, raw results and comments. Thanks everyone for clicking the Like button and subscribing! :) See my channel for the things I recommend the most.    / lachlanling   twitter:   / lachlikesathing   The music used in this video: Peer Gynt Suite No. 1, Op. 46 - IV. In the Hall Of The Mountain King was sourced and can be found here: https://musopen.org/music/1568/edvard... This recording is in the public domain. My explanation of lossless vs lossy:    • Lossless vs. Lossy (Part 1: Overview)   and ABX testing:    • Lossless vs. Lossy (Part 2: ABX Testing)   //////////////////// Software Used Foobar2000 v1.3.1 http://www.foobar2000.org/ ABX Comparator (Foobar2000 Component) http://www.foobar2000.org/components/... WASAPI Output Support (Foobar2000 Component) http://www.foobar2000.org/components/... iTunes v11.1.4.62 (PC) AAC conversion settings: 128k 44.1kHz Constant Bit Rate //////////////////// Equipment & Results All tests were performed on a Surface Pro 2 256gb in Flight Mode on battery power. The room was acoustically treated but there was background noise from surrounding conversations. RUN 1: Shane initially attempted to use a Sennheiser HD650 with a Vioelectric V100 and Headroom Pico DAC. He was unable to perform the first trial due to background noise, and switched to an Audio Technica W10VTG. All trials below were performed with the W10VTG. Results were hidden from view during the trials. Test track: 'When Rain Falls' Chris Botti 14:26:25 : Test started. 14:29:53 : 01/01 50.0% 14:30:18 : 01/02 75.0% 14:32:23 : 02/03 50.0% 14:33:42 : 02/04 68.8% 14:34:41 : 03/05 50.0% 14:35:26 : 04/06 34.4% 14:36:09 : 04/07 50.0% 14:36:54 : 04/08 63.7% 14:37:22 : 04/09 74.6% 14:38:08 : 05/10 62.3% 14:39:14 : Test finished. ---------- Total: 5/10 (62.3%) COMMENT: Shane performed no better than random guessing. The W10VTG is an older headphone and perhaps not ideal testing equipment for these purposes. RUN 2: Tom initially attempted to use an AKG K701 with a Vioelectric V100 and Headroom Pico DAC. He was unable to perform the first trial because of background noise, and switched to a Fitear MH334 custom in-ear monitor, with a JDS Labs Objective 2 amplifier and ODAC on battery power. All trials below were performed with the MH334. Results were hidden from view during the trials. Test track: 'Stroll Through The Sky' Joe Hisaishi 15:01:31 : Test started. 15:07:05 : 01/01 50.0% 15:10:37 : 02/02 25.0% 15:15:21 : 03/03 12.5% 15:17:13 : 04/04 6.3% 15:18:10 : 04/05 18.8% 15:18:59 : 05/06 10.9% 15:19:27 : 06/07 6.3% 15:20:24 : 06/08 14.5% 15:21:27 : 07/09 9.0% 15:22:52 : 08/10 5.5% 15:24:46 : Test finished. ---------- Total: 8/10 (5.5%) COMMENT: Tom performed the best of all 3 participants, but while suggestive, his result is not considered statistically significant (95% confidence level). More trials would need to be conducted to draw any conclusions. RUN 3: Josh performed all trials with a Unique Melody Miracle custom in-ear monitor with a JDS Labs Objective 2 amplifier and ODAC on battery power. Results were hidden from view during the trials. Test track: 'Platinum Disco' Iguchi Yuka 15:39:03 : Test started. 15:43:21 : 00/01 100.0% 15:45:02 : 00/02 100.0% 15:46:08 : 00/03 100.0% 15:46:57 : 01/04 93.8% 15:49:03 : 02/05 81.3% 15:49:29 : 03/06 65.6% 15:50:04 : 03/07 77.3% 15:50:23 : 03/08 85.5% 15:51:08 : 03/09 91.0% 15:51:24 : 04/10 82.8% 15:54:28 : Test finished. ---------- Total: 4/10 (82.8%) COMMENT: Josh performed no better than random guessing. It should be noted that the track Josh chose seems inappropriate for this kind of testing. //////////////////// For reference, I attempted this test at home under similar conditions got the following results on a 16 trial run using the VSonic GR07 and JDS Labs Objective 2 and ODAC. Test track: 'Kugutsuuta ura mite chiru' Kenji Kawai 21:38:26 : Test started. 21:40:33 : 01/01 50.0% 21:42:19 : 01/02 75.0% 21:43:22 : 02/03 50.0% 21:43:44 : 03/04 31.3% 21:44:34 : 04/05 18.8% 21:45:24 : 04/06 34.4% 21:46:14 : 04/07 50.0% 21:46:46 : 05/08 36.3% 21:47:30 : 05/09 50.0% 21:48:10 : 05/10 62.3% 21:48:50 : 06/11 50.0% 21:49:21 : 07/12 38.7% 21:50:00 : 08/13 29.1% 21:50:20 : 09/14 21.2% 21:50:44 : 09/15 30.4% 21:51:19 : 10/16 22.7% 21:52:32 : Test finished. ---------- Total: 10/16 (22.7%) COMMENT: I performed only marginally better than random guessing and did not achieve a statistically significant result.