The downside to using memory playback over a network is that you may have a slight delay during track changes if your network is slow to respond, because all the network activity happens at the start of a track. This means that when you seek through the file, it will be accessing it directly in memory, rather than relying on network access, which explains why it would be faster to seek through a track. The way that memory playback works in MC18 is that it caches the entire file in memory, and then has a buffer of ~40MB for decoded audio during playback. Memory playback will use up to 1GB of memory for cache (capped at 80% of available system memory to avoid swap usage Quote from: Matt on July 15, 2013, 11:45:13 am Overview You enable or disable memory playback in Options > Audio > Play files from memory instead of disk.

The option was added due to popular demand. JRiver is unaware of any test that shows a sound quality advantage to memory playback. This is because asking the decoder its current bitrate is not possible when the decoder has finished with the current track completely in the first couple seconds of playback. With memory playback enabled, the player will no longer report a real-time bitrate (ie. In these cases, the program will cache 1GB, play it mostly out, then cache another 1GB, etc. Some files like DSD played as PCM have very large decoded data so that they might require more memory to cache than (most) any system has. This resource usage as a track starts could lead to audio playback glitches. For example, when playing over Wi-Fi some machines exhibit high resource usage when reading a file quickly. In some cases, the work of decoding and caching a file quickly as a track starts could lead to other problems. Memory playback will use up to 1GB of memory for cache (capped at 80% of available system memory to avoid swap usage).

With a modern computer, playback of a standard CD-quality file will have the fully decoded file in memory in around one second. The theoretical benefits of memory playback are that no disk or network I/O occurs while playing and that CPU load during playback could be reduced. This means playing any form of lossless (WAV, FLAC, APE, ALAC, etc.) will have identical data in memory and identical resource usage. Memory playback now holds decoded data in memory instead of encoded data.

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