New users to ACID are often intimidated when they first see the interface, but that intimidation quickly fades. ACID is intuitive and most users quickly become productive. In fact, Sony makes it easy to start with ACID by bundling over 1,000 high-quality loops on a DVD that comes with the product. You can also use loops that you purchase from Sony. (We also used loops that we purchased years ago from Sonic Foundry for the first version of ACID.) Loops that you purchase from Sony are optimized for use with ACID (they're known as "Acidized" loops), but you can use loops created with other products as well.

Figure 1 : The ACID interface. Click for a larger image.

Figure 1 : The ACID interface. Click for a larger image.

Your creativity isn't limited to loops. You can also use ACID to record multi-track audio, MIDI, and VSTi. Sony calls ACID a music workstation, and the feature-set of the product certainly makes that title appropriate.

When it comes to recording audio, ACID 6 provides flexibility to maximize your creative talents. You can simultaneously record multiple tracks of audio and MIDI directly on the timeline, and ACID 6 even lets you arm multiple tracks and record alternate takes as clips. You can then choose the clip that you like best. If you choose to use audio effects with your recording, you can use input monitoring to hear your audio with effects applied during the recording process. This is just one example of many that illustrates how ACID is designed to give you the flexibility and power to produce exactly the recording you envision.

ACID 6 introduces the concept of project sections. This feature enables you to drag and drop sections of an ACID project to any point within your composition. This feature makes it incredibly easy to create a new arrangement from an existing project or to rearrange and add freshness to a project that's been on the shelf for a while. You can even name your sections and alter the length so that it fits perfectly into your composition.

Figure 2 : Editing MIDI in ACID 6

Figure 2 : Editing MIDI in ACID 6

 If you're into MIDI, ACID 6 has plenty of features that you'll find invaluable. As with many other similar tools, you can use a piano roll or a drum grid interface to edit your MIDI data. You can even draw and erase MIDI notes using ACID's intuitive and unique drawing tools. We also had excellent results with ACID using our M-Audio Axiom 61 as a controller. ACID includes a copy of a special version of Native Instruments KOMPAKT with over 120 instruments. This is a fairly powerful VSTi and adds to ACID's attractiveness. However, if you're used to the flexibility provided by FL Studio or the power of Reason, you won't find that in ACID.

ACID 6 supports 5.1 surround so that you can add impressive surround effects to your projects. ACID's interface allows for optimized surround sound for specific speaker placements. You can use the Surround Panner to configure surround for a particular track, but you can also enlarge the track display and edit surround settings directly on the track.

Figure 3 : 5.1 Surround Editing in ACID 6

Figure 3 : 5.1 Surround Editing in ACID 6

Drum maps are easily created in ACID 6 using Drum Grid Mode. You can edit and create drum patterns directly in the timeline and you can label patch and drum names to aid in the use of drum machines or MIDI devices. If you create a template that you really like, you can easily share it with other ACID Pro 6 users.

Figure 4 : Drum Grid Mode in ACID 6 makes creating drum patterns easy.

Figure 4 : Drum Grid Mode in ACID 6 makes creating drum patterns easy.

Once you've finished your composition in ACID, you can easily publish it to ACID Planet, an online community of ACID users. However, you also have the option of rendering to a large number of file formats including AVI, WAV, MIDI, QuickTime, OGG Vorbis, MP3, WMA/WMV, RealAudio and RealVideo, etc. You may be wondering why you would render a music project to a video format. In fact, ACID allows you to import video to the timeline so that you can easily use its powerful features for scoring of video projects. When you've finished your score, you can render the video complete with the music score right from within ACID.

New users of ACID couldn't possibly pick a better time to start using this excellent product. If you're an owner of a previous version of ACID, version 6 is a must-have upgrade. (Many of the features we've pointed out in this review are new to version 6.) If you have a need to ever create music compositions for any reason, you owe it to yourself to give ACID a try. We are confident that you'll find it to be an indispensible addition to your workflow.

Highly recommended.