Problem: Repetitious Sound.

Possible Cause: An IRQ resource conflict with the USB controller and another device (PC only). Often this will result in a small segment of sound (0.5 to 1 second) repeating itself over and over, sometimes completely locking up the computer. See the general troubleshooting suggestions at the beginning of this section.

•Problem: I’m getting some pops and clicks in my audio recording.

•Possible Cause 1: Input levels are too “hot,” causing clipping or input distortion. Make sure you have the proper signal levels coming from your source audio device, and lower the output if necessary.The incoming levels may be easily viewed from the Audiophile USB Control Panel peak meters.

•Possible Cause 2: Your application software may not have the proper audio buffer sizes set. Each software application handles this differently, but typically there is somewhere in the software’s setup to set the size of the playback and recording buffers used by the application. Some applications also require you to run a calibration (sometimes called “profiling”) the first time you use the software with a new audio interface. For instance, if the clicks are present when using Cakewalk SONAR, then try to run SONAR's Wave Profiler.

•Possible Cause 3: Some accelerated graphics cards use excessive amounts of system bandwidth, preventing the recording buffer of an audio interface from keeping up with demand. This can cause clicks in the recording. Reducing or turning off the graphics card’s graphics acceleration feature often resolves this problem. In Windows, the level of graphics acceleration is accessed from Start Settings Control Panel System Performance Graphics.

Problem: My software application keeps telling me “sample rate not supported” or some similar message.

Possible Cause: This would most likely occur if you were trying to select 96000Hz as a sample rate, and the Maximum Sample Rate available from the Audiophile USB Control Panel is 48000. Open the control panel, and uncheck the Active Port boxes until you have only one port selected for either input or output.

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M-Audio AP-012403 owner manual
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AP-012403 specifications

The M-Audio AP-012403 is a versatile and high-quality audio interface designed for musicians, producers, and podcasters. This device stands out with its user-friendly features, impressive sound quality, and robust build that make it a staple in both home studios and professional setups.

One of the main features of the M-Audio AP-012403 is its dual-input capability. It allows users to connect microphones, instruments, or other audio sources simultaneously, making it ideal for recording bands, duos, or solo artists who wish to layer their sounds. The interface is equipped with high-quality preamps that deliver exceptional sound clarity and warmth, ensuring that every nuance of the performance is captured accurately.

In addition to its input versatility, the device supports high-resolution audio recording up to 24-bit/192 kHz. This means that the M-Audio AP-012403 is capable of capturing audio with remarkable detail, making it suitable for both studio recordings and live performances. Musicians can confidently record their vocals and instruments without worrying about losing quality in the process.

Another key feature is the low-latency monitoring, which allows users to hear their inputs in real-time without the delay that can be distracting during recording sessions. This feature is particularly crucial for vocalists and musicians who rely on accurate timing and pitch when laying down tracks.

The M-Audio AP-012403 also incorporates MIDI connectivity, offering musicians the ability to connect keyboards, controllers, or synths directly to their system. This makes it a great addition for those who work extensively with MIDI instruments as part of their music production process.

Furthermore, the interface comes with a robust software bundle, including digital audio workstations (DAWs) and various virtual instruments and effects. This provides users with everything they need to start producing music right out of the box.

The design of the M-Audio AP-012403 is both sleek and durable, featuring a compact footprint that makes it portable and easy to incorporate into any setup. Additionally, the intuitive plug-and-play functionality ensures that users can get started with minimal hassle.

Overall, the M-Audio AP-012403 combines excellent audio performance with practical features and flexible connectivity options, making it an attractive choice for musicians and content creators looking to elevate their audio production capabilities.
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