This paper is an extension and addition to the previously published and presented during AES 39th conference and AES 129th Convention papers, regarding voice samples quality requirements and compensation for the influence of transmission channels for further forensic or automatic speaker identification. In this paper we provide the analysis of different types of transmission channels such as land line, GSM, radio and VoIP. We analyze the important parameters of voice samples obtained from these channels and compare the influence of different channels on important for speaker identification voice biometric features. At the end of the paper, there are some conclusions provided regarding the circumstances under which the particular recording can be accepted / rejected for forensic speaker identification.
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