There are a few English translations of Kitab al-Aghani, but they might not be complete:
Before hunting for the PDF, it is crucial to understand the scale and significance of this work. kitab al-aghani english translation pdf
Many PhD theses on Middle Eastern studies include translated appendices. These can often be downloaded as PDFs from university repositories (e.g., University of Edinburgh, SOAS London, Harvard DASH). There are a few English translations of Kitab
This text is structured to provide an overview of the work, the status of its translation, and guidance for those seeking the text. University of Edinburgh