弱弱的问一下下，四声道的音频去哪下载？

eternal0

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查wiki就好了。
8 ^' L* H0 `: L/ a6 c! Q2 D2 x: s0 cTechnical Details of Lossy Audio Compression Formats[td]

Audio compression format	Algorithm	Sample Rate	Bit rate	Latency	CBR	VBR	Stereo	Multichannel
AAC	MDCT, Hybrid Subband (AAC-HE)	8 kHz to 192 kHz[39]	8 to 529 kbit/s (stereo)	20−405ms[40]	Yes	Yes	Yes: Dual, Mid/Side, Intensity, Parametric	Yes: Up to 48 channels
AC3	MDCT	32, 44.1, 48 kHz	32 to 640 kbit/s	40.6ms	Yes	No	Yes	Yes: Up to 6 channels
AMR	ACELP	8 kHz	4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20 kbit/s	25ms	Yes	Yes	No	No
AMR-WB (G.722.2)	ACELP	16 kHz	6.60-23.85 kbit/s ( ]' ]% h+ p8 _' M  J* P- b. A(6.60, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05 or 23.85 kbit/s)	25ms	Yes	Yes	Yes: only in MPEG-4 Part 12 container	No
AMR-WB+	ACELP	8, 11.025, 16, 22.05, 32, 44.1, 48 kHz	6 kbit/s to 36 kbit/s (mono) 7 kbit/s to 48 kbit/s (stereo)	60–90 ms	Yes	Yes	Yes	No
apt-X	Subband	24 kHz to 48 kHz (stereo)	192 kbit/s to 384 kbit/s (stereo)	2ms	Yes (4:1)	No	Yes	Yes: Up to 8 channels
ATRAC1	MDCT-Hybrid Subband	Various	292 kbit/s	>100ms	Yes	No	Yes: Dual Only	No
ATRAC3	MDCT-Hybrid Subband	Various	132/66 kbit/s	>100ms	Yes	No	Yes: Dual (LP2), Mid/Side (LP4)	No
ATRAC3plus	MDCT-Hybrid Subband	Various	48-352 kbit/s	>100ms	Yes	?	Yes	Yes: Up to 6 channels
CELT	MDCT	32 to 96 kHz	24 kbit/s[41] to >1 Mbit/s	2ms - 14.5ms (8.9ms typical)	Yes	No	Yes	Yes
Codec2	Speech	8 kHz	1200 bit/s, 1400 bit/s, 2400 bit/s, 2550 bit/s	20ms - 40ms	Yes	No	No	No
GSM-HR	VSELP	8 kHz	5.6 kbit/s	25ms	Yes	No	No	No
GSM-FR	RPE-LTP	8 kHz	13 kbit/s	20-30ms	Yes	No	No	No
GSM-EFR	ACELP	8 kHz	12.2 kbit/s	20-30ms	Yes	No	No	No
HVXC	Speech	8 kHz	2 or 4 kbit/s	36ms	Yes	Yes	No	No
iLBC	Block Independent LPC	8 kHz	13.33, 15.20 kbit/s	30, 20ms	Yes	No	No	No
iSAC	Transform coding	16 kHz or 32 kHz	10 to 52 kbit/s	33 to 63ms	Yes	Yes	No	No
MP3 (MPEG-1, 2, 2.5 Audio Layer III)	MDCT, Hybrid Subband	8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 kHz	8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 192, 224, 256, 320 kbit/s	>100ms	Yes	Yes	Yes: Dual, Mid/Side, Intensity	No
MPEG-1 Audio Layer II (MP2)	Subband	32, 44.1, 48 kHz	32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384 kbit/s	2 D: q2 ]! p% P	Yes	Yes: but decoders are not required to support it	Yes: Dual, Intensity	No
MPEG-2 Audio Layer II (MP2)	Subband	16, 22.05, 24 kHz[42][43]	8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160 kbit/s[42]		Yes	Yes: but decoders are not required to support it	Yes	Yes: up to 5 full range audio channels and an LFE-channel with MPEG Multichannel
Musepack	Subband	32, 37.8, 44.1, 48 kHz	3 to 1300 kbit/s	?	No	Yes	Yes	Yes: Up to 8 channels
Opus	Hybrid (CELP+MDCT)	8 to 48 kHz	6 to 510 kbit/s	5 to 65.2 ms	Yes	Yes	Yes	Yes: Up to 255 channels[44]
RealAudio	MDCT,	Varies (see article)	Varies (see article)	Varies	Yes	Yes	Yes	Yes: Up to 6 channels
SILK	LTP	8, 12, 16, 24 kHz	6 to 40 kbit/s	25ms	Yes	?	?	?
Siren 7	derived from PT716plus, MLT	16 kHz	16, 24, 32 kbit/s	40ms	Yes	No	No	No
Siren 14	MLT	32 kHz	24, 32, 48 kbit/s (mono), 48, 64, 96 kbit/s (stereo)	40ms	Yes	No	Yes	No
Siren 22	MLT	48 kHz	32, 48, 64 kbit/s (mono), 64, 96, 128 kbit/s (stereo)	40ms	Yes	No	Yes	No
Speex	CELP	8, 16, 32, (48) kHz	2.15 to 24.6 kbit/s (NB); 4 to 44.2 kbit/s (WB)	30ms (NB) 34ms (WB)	Yes	Yes	Yes: Intensity	Yes
VMR-WB	ACELP	16 kHz	8.55, 4.0, 0.8, 13.3, 6.2, 2.7, 1.0	33.75ms	Yes	Yes	?	?
Vorbis (Ogg)	MDCT	1 Hz to 200 kHz	variable	>100ms	Yes/ABR	Yes	Yes: Dual, Lossless, Phase, Point (Intensity)	Yes: Up to 255 channels
WavPack Lossy	Prediction, Quantization	1 Hz to 16.777216 MHz	196 kbit/s and up in lossy mode (for CD audio)	?	Yes	Yes	Yes	Yes: Up to 256 channels
Windows Media Audio Standard	MDCT	8, 11.025, 16, 22.05, 32, 44.1, 48  kHz	8 to 768kbit/s	>100ms	Yes	Yes	Yes	No
Windows Media Audio Pro	MDCT	8, 11.025, 16, 22.05, 32, 44.1, 48, 88.2, 96 kHz	4 to 768kbit/s	>100ms	Yes	Yes	Yes	Yes: At least 8 channels, expandable

Technical Details of Lossless Audio Compression Formats[td]

Audio compression format	Algorithm	Sample Rate	Bits per sample	Latency	Stereo	Multichannel
ALAC	Lossless	1 Hz to 384000 Hz	16, 20, 24, 32[45]	?	Yes	Yes: Up to 8 channels
FLAC	Lossless	1 Hz to 655350 Hz	8, 16, 20, 24, (32)	4.3ms - 92ms (46.4ms typical)	Yes	Yes: Up to 8 channels
Monkey's Audio	Lossless	8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 kHz	8, 16, 24	?	Yes	No
RealAudio Lossless	Lossless	Varies (see article)	Varies (see article)	Varies	Yes	Yes: Up to 6 channels
True Audio	Lossless	0–4 GHz	1 to > 64	?	Yes	Yes: Up to 65535 channels
WavPack Lossless	Lossless, Hybrid	1 Hz to 16.777216 MHz	Varies in lossless mode; supports 32-bit float input; 2.2 minimum in lossy mode	?	Yes	Yes: Up to 256 channels
Windows Media Audio Lossless	Lossless	8, 11.025, 16, 22.05, 32, 44.1, 48, 88.2, 96 kHz	16, 24	>100ms	Yes	Yes:Up to 6 channels

eternal0

楼主的问题并不是音频格式，而是现在多声道的音源非常少。多声道音频基本就是DTS-CD、DVD-Audio和SACD，而后两者绝大多数还是两声道的。

eternal0

1on1X22 发表于 2013-1-30 11:12
  W( t9 d* S, ^多谢！DTS-CD有没有经典的推荐啊？随便搜出来的都是不知名的歌手唱的不知名的或者老掉牙的曲目。
0 t, H: C% e# f& A8 d) p最好是 ...

DTS-CD用的是有损压缩，基本算是没落了。纯音频的多声道受众太小，没什么好的片源，手里只有一张02年维也纳新年音乐会的SACD是多声道的。

现在玩多声道还是要靠BD，6ch 24bit LPCM还是很爽的。

eternal0

1on1X22 发表于 2013-1-30 15:27
- `, `1 t+ D/ D2 E" M多谢指点！SACD能做成镜像么？如果可行的话能否共享给我见识见识？

  K$ Q9 I: \6 [5 d6 [8 ?PS3破解之后SACD就破了，现在网上很多镜像。

eternal0

1on1X22 发表于 2013-1-31 21:27
能否介绍几个相关站点？

咱一般去这：
http://www.jdtop.net/
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这个站主要是DVD-Audio、SACD这种高格音频比较全。