Certain cutting regimes in turning process may lead to decreased quality of produced parts. One possible indication of tough cutting condition is the value increase in three cutting force components (tangential, radial and axial). Force measurement during the turning process requires installation of three-component dynamometer directly on the cross slide, which, to the very least, can be technically challenging, in addition to possible implementation costs. Cutting sound is also observed to be changing in regard to cutting conditions, while sound sensor, opposed to force sensor, does not require close contact with the tool-workpiece interface and is more feasible to integrate into machine. The aim of this paper is to inspect correlation that cutting sound has with cutting force components in longitudinal turning of C45E steel. For this reason, a total of 100 experiment trials were performed with different combinations of cutting parameters (cutting speed, depth of cut, feed rate). For each trial, cutting sound and cutting forces were recorded, and various features were extracted from every sample of stable cutting sound. The correlation analysis showed that the tangential and axial forces have high correlation value with 6th Mel-frequency cepstral coefficient, while radial force correlates well to a number of sound features, including Mel-frequency cepstral coefficients and spectral features. The analysis also revealed that correlation with tangential force is stronger at lower cutting speeds. Some possibilities for low correlation at higher cutting speeds are discussed in terms of excessive vibrations and chip breakage.