Balabolka is a Text-To-Speech (TTS) program. All computer voices installed on your system are available to Balabolka. The on-screen text can be saved as an audio file. The program can read the clipboard content, extract text from documents, customize font and background color, and control reading from the system tray or by the global hotkeys. Balabolka supports text file formats AZW, AZW3, CHM, DjVu, DOC, DOCX, EML, EPUB, FB2, FB3, HTML, LIT, MD, MOBI, ODP, ODS, ODT, PDB, PRC, PDF, PPT, PPTX, RTF, TCR, WPD, XLS, XLSX. The program uses various versions of Microsoft Speech API (SAPI); it allows to alter a voice's parameters, including rate and pitch. The user can apply a special substitution list to improve the quality of the voice's articulation. This feature is useful when you want to change the spelling of words. The rules for pronunciation correction use the syntax of regular expressions. Balabolka can save the synchronized text in external LRC files or in MP3 tags.