On the First Aid tab click Repair Disk Permissions.Open the Utilities folder located in Macintosh HD>Applications >Utilities.This only takes a few minutes and it is a general maintenance routine for the OS, and important to ensure the proper functioning of MIDI and audio. Please refer to your application’s user guide to find out how to change the buffer size. This setting is generally located in the Preferences Menu in an audio configuration menu. In OS X, this setting is adjusted from within your recording application. You may need to stop playing audio any time you change this setting, and certain applications will require you to relaunch the program before the new buffer size settings become active. Then, raise the buffer size setting until these glitches disappear. To find your system’s optimum buffer size setting, begin with a high setting and gradually reduce the size until you begin to hear clicks, pops, or other audible glitches in your audio. On the other hand, if the buffer size is set too high, your computer will process audio without incident, but your software will feel sluggish and unresponsive. If the buffer size is too small, the computer will not be able to make all the required audio calculations in time, and you will hear pops, clicks, and stuttering in your audio streams. The goal of setting a buffer size is to reduce it as much as possible without hearing any clicks, pops, or other glitches. It may be necessary to experiment with various settings until you find the best buffer size for your system. Due to variations between computer hardware and software, it is impossible to recommend a single optimum setting for all systems. PowerMac G5 users with Dual 1.8 / Dual 2.0 processors see this FAQ for compatibility information.īuffers are used to help keep audio hardware and software running smoothly by processing audio in groups of samples rather than one sample at a time. Click here for a guide to walk you through this process Windows XP users only do you experience pops and clicks associated with graphics activity such as opening, closing, or minimizing windows? Do you get a zipper noise when moving the mouse? Try lowering the Hardware Acceleration for your Video/Graphics Card and see if performance improves. Please visit for download links and more information on using this tool to check for latency spikes. As often times these drouputs are caused by other devices on the system, this tool can be helpful when troubleshooting IRQ’s. It may help to find the cause for interruptions in real-time audio and video streams, also known as drop-outs. Thesycon’s DPC Latency Checker is a free Windows tool that analyses the capabilities of a computer system to handle real-time data streams properly. Also check the manufacturer's website to ensure you have the latest drivers for your video/graphics card. Manufacturer's often update these to fix problems and compatibility issues with new operating system releases and updates, some of which may be responsible for the issues you are experiencing. PC Optimization Guide for Windows VistaĬheck the manufacturer's website for your motherboard for any BIOS, driver, or chipset updates for your motherboard.See the Optimization sections of these guides, though written for Pro Tools, the optimizations are also applicable to all other audio applications: There are a variety of other settings that can be adjusted to improve performance. For best possible performance, it is recommended that you optimize your computer system to improve performance with audio applications. We have a separate article for more in-depth IRQ Troubleshooting.Īudio applications can be affected by system settings and other software and hardware drives installed on your computer. If you have installed a FireWire expansion card, shut down the computer and test the card in a different PCI or cardbus slot. To enable the device, right-click and select enable. Right-click and choose disable to disable the device. With the exception of your video/graphics cards, these other devices can be disabled to eliminate the conflict. Look for the PCI number listed before your FireWire controllerĭo other devices have the same PCI number? If a device such as the graphics/video card, Network Controller (Ethernet, modem, or wireless), or the built-in audio card have the same number, this may be the source of your problem.Find your “OHCI Compliant IEEE 1394 Host Controller” in the list.Select Interrupt Request (IRQ) and a list will be displayed.Select Resources by Connection from the “View” menu.
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