Liv1:
Запись на любой аналоговый носитель тоже происходит с потерями. Причем гораздо большими, чем в случае mp3. Но для кого-то они являются приемлемыми.
а какие потери при записи музыки на студийный магнитный аналоговый носитель?
сколько то значимые.
Разница в звучании (если она есть), объясняется не этим. Никакой рутинной интерполяции нет. Идет рутинная коррекция ошибок с полным восстановлением исходных данных, для чего в формате CD использовано избыточное кодирование.
до 1.9 mc. но все эти расуждения верны для фирменного штампованного диска с идеальной поврехностью и 98%. Для самописаного и поюзанного - все уже не так.
Тем более мы говорим о CDR у которых отражение меньше, а ошибок просто при прожиге и деградации - больше. плюс дешевые проигрыватели и деградация pickup. Плюс вибрация лазера от внешних источников, так же трансформатора и движков. Плюс дешевые генераторы-кварцы со своим вкладом в джитер.
помимо этого sample-rate conversion у которого побочный эффект - амплитудная ошибка..Которая как утверждается и вносит вклад в качество звука. Где то рассказывали про пример на выставке прослушивания с отключеним ресемплинга и как это слышно.
Плюс сам dac который по сути воссоздает сигнал вовсе не идентичный оригиналу. И его помехи по питанию.
Вероятность интерполяции для типичного для CD потока ошибок - примерно раз в 100 часов проигрывания.
Как то не коррелирует с опытом, когда на только что записанном CDR выдается лог по повторным считываниям при верификации. Утилиты когда то были распространены, выдававшие диагностику дисков на чтение.
Собственно при CD ripping эта статистика выдается на C1 C2 CU. упоминается что С1 на хорошем диске до 220 errors per second based on 10 second samples. И до двух процентов новых нецарапаннх дисков c C2. Что и привело к созданию всяких более точных утилит для ripping.
А аудио проигрыватель ничего не перечитывает повторно.
ну и немного статистики
AccurateRip collects data from all drives, normally this is only used to verify a disc is accurate, but can be reversed to calculate which drives are the most accurate (as measured by lowest % inaccurate tracks).
This test was previously run in 2013, 2012, 2010, 2009 and 2006, as time goes on more submissions give a greater meaning to the results, only drives with over 4000 submissions and 40 users are used.
Note that MATSHITA is also known as Panasonic.
Top Drives
Drive: MATSHITA - DVD-R UJ-85J (92 users): Submissions: 4675 accurate, 29 inaccurate, 99.3835 % accuracy
Drive: PLDS - DVD-RW DS8A8SH (68 users): Submissions: 4908 accurate, 38 inaccurate, 99.2317 % accuracy
Drive: MATSHITA - DVD-RAM UJ-812 (49 users): Submissions: 6332 accurate, 52 inaccurate, 99.1855 % accuracy
Drive: PLEXTOR - CD-R PX-230A (126 users): Submissions: 6591 accurate, 56 inaccurate, 99.1575 % accuracy
Drive: LITE-ON - CD-RW SOHR-5238S (78 users): Submissions: 10929 accurate, 100 inaccurate, 99.0933 % accuracy
Drive: MATSHITA - DVD-RAM UJ-852 (142 users): Submissions: 6224 accurate, 64 inaccurate, 98.9822 % accuracy
Drive: TSSTcorp - DVD-ROM TS-H352C (121 users): Submissions: 6804 accurate, 83 inaccurate, 98.7948 % accuracy
Drive: PLEXTOR - CD-R PX-W2410A (114 users): Submissions: 6718 accurate, 85 inaccurate, 98.7506 % accuracy
Drive: TSSTcorp - DVDWBD SH-B123L (283 users): Submissions: 4926 accurate, 64 inaccurate, 98.7174 % accuracy
Drive: HL-DT-ST - DVDRAM GT30N (480 users): Submissions: 7582 accurate, 99 inaccurate, 98.7111 % accuracy
Drive: LITE-ON - DVDRW SHM-165H6S (189 users): Submissions: 11810 accurate, 157 inaccurate, 98.6881 % accuracy
Drive: PLEXTOR - DVD-ROM PX-130A (214 users): Submissions: 6647 accurate, 91 inaccurate, 98.6494 % accuracy
Drive: HL-DT-ST - RW-DVD GCC-4244N (155 users): Submissions: 7411 accurate, 102 inaccurate, 98.6424 % accuracy
Drive: TSSTcorp - CD-DVDW SH-S183A (475 users): Submissions: 32831 accurate, 467 inaccurate, 98.5975 % accuracy
Drive: MATSHITA - DVD-RAM UJ862AS (176 users): Submissions: 3654 accurate, 52 inaccurate, 98.5969 % accuracy
Drive: SONY - DVD RW DRU-830A (140 users): Submissions: 7691 accurate, 115 inaccurate, 98.5268 % accuracy
Drive: PLEXTOR - DVDR PX-760A (627 users): Submissions: 64297 accurate, 987 inaccurate, 98.4881 % accuracy
Drive: HL-DT-ST - DVD+-RW GSA-H31N (167 users): Submissions: 8590 accurate, 132 inaccurate, 98.4866 % accuracy
Drive: LITE-ON - DVDRW LH-18A1H (44 users): Submissions: 4641 accurate, 73 inaccurate, 98.4514 % accuracy
Drive: HL-DT-ST - RW-DVD GCC-4247N (152 users): Submissions: 14564 accurate, 238 inaccurate, 98.3921 % accuracy
Drive: PLEXTOR - CD-R PX-W4824A (161 users): Submissions: 7881 accurate, 131 inaccurate, 98.3650 % accuracy
Drive: PLEXTOR - DVDR PX-712A (364 users): Submissions: 16157 accurate, 272 inaccurate, 98.3444 % accuracy
Drive: SAMSUNG - CDRW-DVD SM-348B (64 users): Submissions: 5695 accurate, 98 inaccurate, 98.3083 % accuracy
Drive: SONY - DVD RW DRU-810A (122 users): Submissions: 7786 accurate, 134 inaccurate, 98.3081 % accuracy
Drive: TOSHIBA - DVD-ROM SD-R9012 (54 users): Submissions: 4320 accurate, 75 inaccurate, 98.2935 % accuracy
Drive: ASUS - DRW-24B1ST a (228 users): Submissions: 5052 accurate, 89 inaccurate, 98.2688 % accuracy
Drive: PLEXTOR - CD-R PX-W1210A (103 users): Submissions: 4766 accurate, 85 inaccurate, 98.2478 % accuracy
Drive: LITE-ON - DVDRW SHM-165P6S (204 users): Submissions: 8395 accurate, 151 inaccurate, 98.2331 % accuracy
Drive: MATSHITA - DVD-RAM UJ-852S (240 users): Submissions: 11219 accurate, 201 inaccurate, 98.2399 % accuracy
Drive: HL-DT-ST - DVD+-RW GH30N (113 users): Submissions: 6771 accurate, 122 inaccurate, 98.2301 % accuracy
Drive: PHILIPS - CDRW-DVD SCB5265 (126 users): Submissions: 9976 accurate, 181 inaccurate, 98.2180 % accuracy
Drive: SONY - DVD+-RW DW-D56A (88 users): Submissions: 5655 accurate, 104 inaccurate, 98.1941 % accuracy
Drive: PBDS - DVD+-RW DH-16W1S (186 users): Submissions: 17202 accurate, 317 inaccurate, 98.1905 % accuracy
Drive: ASUS - DRW-24B1ST (290 users): Submissions: 5081 accurate, 94 inaccurate, 98.1836 % accuracy
Drive: PLEXTOR - DVDR PX-716A (942 users): Submissions: 66656 accurate, 1240 inaccurate, 98.1737 % accuracy
Drive: Optiarc - DVD RW AD-7580S (277 users): Submissions: 4397 accurate, 82 inaccurate, 98.1692 % accuracy
Drive: MATSHITA - DVD-RAM UJ-822S (140 users): Submissions: 8072 accurate, 154 inaccurate, 98.1279 % accuracy
Drive: TSSTcorp - DVD-ROM SH-D162C (243 users): Submissions: 8720 accurate, 169 inaccurate, 98.0988 % accuracy
Drive: PLDS - DVD+-RW DH-16A6S (225 users): Submissions: 10582 accurate, 206 inaccurate, 98.0905 % accuracy
Drive: MATSHITA - DVD-RAM UJ-842 (207 users): Submissions: 10474 accurate, 204 inaccurate, 98.0895 % accuracy
Drive: MATSHITA - DVD-RAM UJ-850S (742 users): Submissions: 25772 accurate, 503 inaccurate, 98.0856 % accuracy
Drive: TSSTcorp - DVD+-RW TS-L632D (549 users): Submissions: 27433 accurate, 539 inaccurate, 98.0731 % accuracy
Drive: ATAPI - DVD A DH16A6S (137 users): Submissions: 4144 accurate, 82 inaccurate, 98.0596 % accuracy
Drive: TSSTcorp - DVD+-RW TS-T633A (179 users): Submissions: 5369 accurate, 108 inaccurate, 98.0281 % accuracy
Drive: PIONEER - DVD-RW DVR-110 (127 users): Submissions: 5277 accurate, 107 inaccurate, 98.0126 % accuracy
Drive: PLEXTOR - DVDR PX-L890SA (287 users): Submissions: 8769 accurate, 178 inaccurate, 98.0105 % accuracy
Drive: PHILIPS - DVD+-RW DVD8701 (87 users): Submissions: 9176 accurate, 187 inaccurate, 98.0028 % accuracy
Drive: LITE-ON - DVDRW LH-18A1P (117 users): Submissions: 4658 accurate, 95 inaccurate, 98.0013 % accuracy
Probably all these drives are no longer manufactured, ebay is your best bet in finding one of these drives.
Re: CD/DVD Drive Accuracy List 2014
Drives you should bin
Code:
Drive: HL-DT-ST - DVDRAM GSA-H62L (88 users): Submissions: 6122 accurate, 703 inaccurate, 89.6996 % accuracy
Drive: TSSTcorp - DVD+-RW TS-L532B (103 users): Submissions: 4670 accurate, 457 inaccurate, 91.0864 % accuracy
Drive: Optiarc - DVD RW AD-7560A (261 users): Submissions: 7952 accurate, 767 inaccurate, 91.2031 % accuracy
Drive: HL-DT-ST - DVD-RW_GSA-H41N (71 users): Submissions: 12849 accurate, 1216 inaccurate, 91.3544 % accuracy
Drive: Optiarc - DVD RW AD-5170A (366 users): Submissions: 14871 accurate, 1136 inaccurate, 92.9031 % accuracy
Drive: Optiarc - DVD RW AD-7170S (343 users): Submissions: 12201 accurate, 929 inaccurate, 92.9246 % accuracy
Drive: SONY - DVD RW DRU-510A (116 users): Submissions: 13385 accurate, 987 inaccurate, 93.1325 % accuracy
Drive: _NEC - DVD_RW ND-2500A (335 users): Submissions: 9545 accurate, 671 inaccurate, 93.4319 % accuracy
Drive: PHILIPS - DVD+-RW SDVD8820 (216 users): Submissions: 9045 accurate, 632 inaccurate, 93.4690 % accuracy
Drive: TSSTcorp - CDDVDW TS-L633L (165 users): Submissions: 4148 accurate, 288 inaccurate, 93.5077 % accuracy
Drive: _NEC - DVD_RW ND-3520AW (435 users): Submissions: 13445 accurate, 931 inaccurate, 93.5239 % accuracy
Drive: HL-DT-ST - DVDRAM GSA-H44N (235 users): Submissions: 11878 accurate, 808 inaccurate, 93.6308 % accuracy
Drive: Optiarc - DVD+-RW AD-5560A (151 users): Submissions: 4820 accurate, 326 inaccurate, 93.6650 % accuracy
Drive: LITE-ON - DVDRW SOHW-832S (137 users): Submissions: 4932 accurate, 332 inaccurate, 93.6930 % accuracy
Drive: Optiarc - DVD+-RW AD-5170S (91 users): Submissions: 6170 accurate, 415 inaccurate, 93.6978 % accuracy
Drive: HL-DT-ST - DVD-RW GSA-H60L (113 users): Submissions: 4775 accurate, 309 inaccurate, 93.9221 %