分类目录归档:多媒体

各种标准和各种格式真麻烦

http://www.midi.org/

发现MIDI相关的标准还真多,
MIDI Specification Info
(MIDI) MIDI 1.0
(GM) General MIDI
(DLS)Downloadable Sounds
(SP-MIDI) Scalable Polyphony MIDI
(MDLS/XMF) Mobile DLS & Mobile XMF
(SMF) Standard MIDI Files
(XMF) eXtensible Music File
MIDI Tuning
(MMC) MIDI Machine Control
(MSC) MIDI Show Control

MIDI: Complete MIDI 1.0 Detailed Specification v96.1 (second edition) (2001)
(Contains MIDI 1.0, SMF, MMC, MSC 1.1, MTC, and GM-1 with Developer Guidelines)
SP-MIDI: Scalable Polyphony MIDI Specification & Profiles (Corrected Nov ’04)
XMF: eXtensible Music File (XMF) Specification v.1.01 (updated) (Jul ’03)
GM-Lite: GM Lite Specification and Guidelines for Mobile Applications (Nov’01)
DLS-2: Downloadable Sounds 2.1 Specification (updated Aug ’01) (Corrected Sep ’04 & Nov ’04)
GM-2: General MIDI 2 Specification v 1.1 (updated) (Sep ’03)
Mobile DLS/XMF: DLS/XMF Format for Mobile Devices (Sep ’04)

现在还在看MMF, PMD, AMR, QCP, MP3什么的格式。你说弄这么多标准,这么多格式干什么?一个人要搞懂这么多标准,这么多格式得花多少时间?

MIDI串连的问题

我想把两个MIDI串起来,用程序把各个音轨的数据连了起来。但有些没问题,有些就有问题,主要表现在后面的一个MIDI文件有噪声,而且如果顺序播放时没问题,如果播放时拖到第二个MIDI时就有噪声。可能是什么原因?