# Newsletter 78

DevFeed: [Newsletter 78](<https://devfeed.tech/articles/newsletter-78-32944.md>)

Original publisher: [Read original article](<https://reactos.org/blogs/newsletter-78/>)

Published: 2010-11-23T00:00:00Z

Content type: article

Language: en

Sources: [Front Page on ReactOS Website](<https://devfeed.tech/sources/front-page-on-reactos-website.md>)

Topics: [ReactOS](<https://devfeed.tech/topics/reactos.md>), [Kernel](<https://devfeed.tech/topics/kernel.md>), [Streaming](<https://devfeed.tech/topics/streaming.md>), [Processes](<https://devfeed.tech/topics/processes.md>), [Code](<https://devfeed.tech/topics/code.md>)

Tags: [code](<https://devfeed.tech/tags/code.md>), [free](<https://devfeed.tech/tags/free.md>), [kernel](<https://devfeed.tech/tags/kernel.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [os](<https://devfeed.tech/tags/os.md>), [processes](<https://devfeed.tech/tags/processes.md>), [react](<https://devfeed.tech/tags/react.md>), [reactos](<https://devfeed.tech/tags/reactos.md>), [streaming](<https://devfeed.tech/tags/streaming.md>), [win32](<https://devfeed.tech/tags/win32.md>), [winapi](<https://devfeed.tech/tags/winapi.md>)

## AI overview

ReactOS Newsletter 78 explains the Windows sound stack through source and destination lines, topology pins, mixer nodes, and node partitioning. It also reports work on ReactOS sound handling and mouse-message processing.

## Source excerpt

Sound Stack The sound stack on Windows has a fairly clearcut layout, but the explanation provided in issue 65 of the newsletter was very brief and likely confusing so a more complete explanation follows. The sound card on a computer deals with two types of lines, source and destination. Source lines are effectively inputs from various things like the CD-ROM, microphone, or the like. Destination lines are ouputs from the card to speakers, headphones, and such.