In addition to a standard size buffer setting, Digital Performer also has an additional setting called "Work Priority". The default value for this setting is 'High'. If you would like to use a buffer size of 1024 KB with your Liquid Mix, you may need to set the Work Priority setting to 'Low' or 'Medium'. Otherwise you could experience incontinuity in audio streaming. The buffer settings for Digital Performer are accessed in "Setup > Configure Audio System > Configure Hardware Driver..."
as shown in Figure 1 below.